The Comfort Light Self-Inflating Sleeping Mat is a lightweight, backpacking option that offers superb comfort at a low weight and in a small packed size. The Delta Core technology removes 40% of bulk and weight without compromising on comfort. The multi-function valve flips over to allow fast deflation without fighting re-inflation as you go. This pad is a real alternative to air pads for many backpackers and campers who like to sleep comfortably.
The Comfort Light Self-Inflating Sleeping Mat is a lightweight, backpacking option that offers superb comfort at a low weight and in a small packed size. The Delta Core technology removes 40% of bulk and weight without compromising on comfort. The multi-function valve flips over to allow fast deflation without fighting re-inflation as you go. This pad is a real alternative to air pads for many backpackers and campers who like to sleep comfortably.
The Comfort Light Self-Inflating Sleeping Mat is a lightweight, backpacking option that offers superb comfort at a low weight and in a small packed size. The Delta Core technology removes 40% of bulk and weight without compromising on comfort. The multi-function valve flips over to allow fast deflation without fighting re-inflation as you go. This pad is a real alternative to air pads for many backpackers and campers who like to sleep comfortably.
The Comfort Light Self-Inflating Sleeping Mat is a lightweight, backpacking option that offers superb comfort at a low weight and in a small packed size. The Delta Core technology removes 40% of bulk and weight without compromising on comfort. The multi-function valve flips over to allow fast deflation without fighting re-inflation as you go. This pad is a real alternative to air pads for many backpackers and campers who like to sleep comfortably.
Last updated at 06/06/2026 09:40:14
Sea to Summit Comfort Light Self-Inflating Lightweight Camping & Backpacking Sleeping Mat
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Sea to Summit Comfort Light Self Inflating - Sleeping mat
Delivery $129.07
Latestbuy Comfort Light SI Mat - Small
originally posted on REI
I bought this pad over a year ago, and have had it out on the trail and camping for over 20 nights. It was definitely an upgrade from the Z-Lite Sol that I had before, I can't believe anyone uses those, even if you're trying to ultralite. This pad is worth its weight for the comfort it provides.This pad is incredibly comfortable, I am a side and back sleeper. I've used it on cold nights, but honestly can't speak to how well this pad insulates as I can't compare it to many others.I've never quite understood the self-inflation functionality, I don't know how much success I've had getting it to do that. I always end up blowing into it several times anyway to get it fully inflated (that doesn't bother me.)Feels sturdy, construction is good, no complaints on that ... MoreI bought this pad over a year ago, and have had it out on the trail and camping for over 20 nights. It was definitely an upgrade from the Z-Lite Sol that I had before, I can't believe anyone uses those, even if you're trying to ultralite. This pad is worth its weight for the comfort it provides.This pad is incredibly comfortable, I am a side and back sleeper. I've used it on cold nights, but honestly can't speak to how well this pad insulates as I can't compare it to many others.I've never quite understood the self-inflation functionality, I don't know how much success I've had getting it to do that. I always end up blowing into it several times anyway to get it fully inflated (that doesn't bother me.)Feels sturdy, construction is good, no complaints on that front. As others have noted this thing can be challenging to get back in the stuff sack. Wholeheartedly agree, it's a tight squeeze for sure. You'll have to fold it and squeeze the life out of the thing in order to fit it in the bag. I got used to it!
originally posted on seatosummitusa.com
Used this pad camping in snow, on a night that got down to 24 degrees F. I'm primarily a side sleeper, and was pretty comfortable. Although the air was very cold, I never felt cold seeping up from the ground. The multi-function valve works well.This pad isn't the lightest, thickest, most insulating, most compact, or largest pad - but it's an excellent set of compromises on all fronts. That said, I'm docking a star for the "self-inflating" description. I followed the instructions, leaving the pad fully inflated for a day prior to packing out, and I still needed to do most of the work putting the air in. Maybe this will improve as the pad gets used more, but I was disappointed.
originally posted on REI
I bought one of these in 2020, looking to replace the cheap inflatable pad that most people have bought when they first started. This pad was everything I wanted. My girlfriend loved it so much, I bought one more just so I could drag her out for more trips! I toss and turn all night and never wake up my partner because there is no crinkly insulation like you find in many other pads. I'm not an ultralight guy so the size and weight are well worth the quality of sleep I get. The downside to this pad is definitely the self-inflating concept. I have yet to see this pad inflate to even 50% of what I'd expect. This isn't a huge issue because it only takes a few breaths to blow it all the way up. Time will tell how this pad handles that type of moisture from breathing into it.
| R-Value | 3.1 | ASTM F3340−18 |
| External Dimensions | 183L x 51W cm |
| Packed Dimensions | 28L x 14W x 14H cm |
| Mat Thickness | 5 cm |
| Fill Material | Delta Core PU Foam |
Sea to Summit Comfort Light Self-Inflating Lightweight Camping & Backpacking Sleeping Mat
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Sea to Summit Comfort Light Self Inflating - Sleeping mat
Delivery $129.07
Latestbuy Comfort Light SI Mat - Small
I bought this pad over a year ago, and have had it out on the trail and camping for over 20 nights. It was definitely an upgrade from the Z-Lite Sol that I had before, I can't believe anyone uses those, even if you're trying to ultralite. This pad is worth its weight for the comfort it provides.This pad is incredibly comfortable, I am a side and back sleeper. I've used it on cold nights, but honestly can't speak to how well this pad insulates as I can't compare it to many others.I've never quite understood the self-inflation functionality, I don't know how much success I've had getting it to do that. I always end up blowing into it several times anyway to get it fully inflated (that doesn't bother me.)Feels sturdy, construction is good, no complaints on that ... MoreI bought this pad over a year ago, and have had it out on the trail and camping for over 20 nights. It was definitely an upgrade from the Z-Lite Sol that I had before, I can't believe anyone uses those, even if you're trying to ultralite. This pad is worth its weight for the comfort it provides.This pad is incredibly comfortable, I am a side and back sleeper. I've used it on cold nights, but honestly can't speak to how well this pad insulates as I can't compare it to many others.I've never quite understood the self-inflation functionality, I don't know how much success I've had getting it to do that. I always end up blowing into it several times anyway to get it fully inflated (that doesn't bother me.)Feels sturdy, construction is good, no complaints on that front. As others have noted this thing can be challenging to get back in the stuff sack. Wholeheartedly agree, it's a tight squeeze for sure. You'll have to fold it and squeeze the life out of the thing in order to fit it in the bag. I got used to it!
Used this pad camping in snow, on a night that got down to 24 degrees F. I'm primarily a side sleeper, and was pretty comfortable. Although the air was very cold, I never felt cold seeping up from the ground. The multi-function valve works well.This pad isn't the lightest, thickest, most insulating, most compact, or largest pad - but it's an excellent set of compromises on all fronts. That said, I'm docking a star for the "self-inflating" description. I followed the instructions, leaving the pad fully inflated for a day prior to packing out, and I still needed to do most of the work putting the air in. Maybe this will improve as the pad gets used more, but I was disappointed.
I bought one of these in 2020, looking to replace the cheap inflatable pad that most people have bought when they first started. This pad was everything I wanted. My girlfriend loved it so much, I bought one more just so I could drag her out for more trips! I toss and turn all night and never wake up my partner because there is no crinkly insulation like you find in many other pads. I'm not an ultralight guy so the size and weight are well worth the quality of sleep I get. The downside to this pad is definitely the self-inflating concept. I have yet to see this pad inflate to even 50% of what I'd expect. This isn't a huge issue because it only takes a few breaths to blow it all the way up. Time will tell how this pad handles that type of moisture from breathing into it.
My beloved Comfort Light SI sleeping pad suddenly sprang three irrepairable leaks after at least 160 nights of use (one leak is at the margin of the valve, two are in the edge/seam of the mattress near the valve). That's a good run compared to other pads I have used (comparable to the original Thermarest, better than the ultralight Thermarest, far superior to the Big Agness air mattress I enjoyed for less than a week). Based on a friend's experience, I expect Sea To Summit to replace the pad under their lifetime warranty. I never had a leak prior to these. I find the 2" thickness very comfortable and warm (I've used it in temperatures down to about 15 degrees F). The material is very quiet. The reversible one-way valve is genius. This isn't the lightest pad, but I ... MoreMy beloved Comfort Light SI sleeping pad suddenly sprang three irrepairable leaks after at least 160 nights of use (one leak is at the margin of the valve, two are in the edge/seam of the mattress near the valve). That's a good run compared to other pads I have used (comparable to the original Thermarest, better than the ultralight Thermarest, far superior to the Big Agness air mattress I enjoyed for less than a week). Based on a friend's experience, I expect Sea To Summit to replace the pad under their lifetime warranty. I never had a leak prior to these. I find the 2" thickness very comfortable and warm (I've used it in temperatures down to about 15 degrees F). The material is very quiet. The reversible one-way valve is genius. This isn't the lightest pad, but I find the reliability and comfort worth it even for backpacking (I used it mostly for sea kayaking).
I've used it for 6 nights mostly in the Sierras so far. Coming from a friend's more minimalistic suggestion (read: thin), this was virtually the same weight and much more comfortable. Found a firmness reasonably good for side sleeping and very comfortable for back sleeping. At 5'10" and 160 lbs, the size is just big enough for the whole body.The valve design is fantastic. Simple and flush with the mat. Lets air only go one way for either easy inflation or deflation, plus burp out a little air at a time to dial in firmness as desired.As self inflating pads go this is among the lightest. Advantage with the foam, it feels less like a waterbed than some straight inflatables do. It takes care of most of its own blowing up. Keep it stored with some air in it long term ... MoreI've used it for 6 nights mostly in the Sierras so far. Coming from a friend's more minimalistic suggestion (read: thin), this was virtually the same weight and much more comfortable. Found a firmness reasonably good for side sleeping and very comfortable for back sleeping. At 5'10" and 160 lbs, the size is just big enough for the whole body.The valve design is fantastic. Simple and flush with the mat. Lets air only go one way for either easy inflation or deflation, plus burp out a little air at a time to dial in firmness as desired.As self inflating pads go this is among the lightest. Advantage with the foam, it feels less like a waterbed than some straight inflatables do. It takes care of most of its own blowing up. Keep it stored with some air in it long term to preserve the "S" in SI.Lying on it deflated doesn't offer much if any insulation, so do not count on that if you get a puncture (not an issue for me yet). Still better than nothing or an empty plastic sheet though?A non foam inflatable may pack down to half the size and shave a few ounces, but something about the comfort and sturdiness of this one has me really enjoying it. Great balance for 3-4 day trips and a good night's sleep!
Bought this as a lightweight option SI mat for the kids (4&7yo) to replace their Roman tornados as we plan to start some overnight hiking in addition to our car camping.Now have two of these mats and they are perfect for the kids. Good size and I'm confident in their durability and that these mats will last for many years as the kids grow. I didn't want to go full out on an inflatable mat as my kids are rough with their gear. Not the lightest weight option available, but for the price and quality, I'll just do a few extra squats at the gym.I did open up the mat when I first got it to let the foam expand, then pumped some air into it.The one way deflate valve is genius. It took me a couple of attempts to get the mat back into the bag, but once I learnt how to ... MoreBought this as a lightweight option SI mat for the kids (4&7yo) to replace their Roman tornados as we plan to start some overnight hiking in addition to our car camping.Now have two of these mats and they are perfect for the kids. Good size and I'm confident in their durability and that these mats will last for many years as the kids grow. I didn't want to go full out on an inflatable mat as my kids are rough with their gear. Not the lightest weight option available, but for the price and quality, I'll just do a few extra squats at the gym.I did open up the mat when I first got it to let the foam expand, then pumped some air into it.The one way deflate valve is genius. It took me a couple of attempts to get the mat back into the bag, but once I learnt how to roll it (tight), it was quite simple. However, I store these lightly rolled / folded in the garage when home.For adults - I tried the mat and I'm a side sleeper. Felt good and my hip didn't touch the ground. The width of this mat is narrower than my usual mat which is the the Sea to Summit Comfort Plus Insulated Sleeping Mat (Small).Factoid: the stuff sack pump from my comfort plus fits into this mat and also the S2S Aeros pillow.
This is a great pad for people getting into backpacking but also wanting something they can use for car camping as well and aren't ready to commit to a fully inflatable pad. Its durable, comfortable and intuitive to inflate, self inflating feature is nice since you only need a few breaths to inflate fully after it's done it's thingMy only issues are that it is on the heavier side (all self inflating pads are heavier than purely inflatable pads because of the foam) and its difficult, but not impossible, to roll it up tight enough to fit it back into the included stuff sack when breaking camp.
I hate to be the "gram counter" but as others have noted, the Large is not a 28 oz pad, but a 34.5 oz pad—significantly heavier than advertised and over two pounds. For the weight it just doesn't feel as comfy, stable, or luxurious as the Comfort Plus SI. If you're going to splurge on comfort, you might as well step up to the Comfort Plus SI (~43 oz). Or if weight is more important, go with an Ether Light XT/Air (23 oz / 18 oz respectively). The Comfort Light SE kind of fits between these two tiers in weight. Although I'd go for the thicker Ether Light if you're a side sleeper, even though it's an air pad rather than an air & foam hybrid, just because you'll be bottoming out in this pad, since it's just 2", regardless of its materials.
Purchased the pad for bicycle touring, but once inflated, it is nearly impossible to repack to the size from the factory. The pad takes up more than half of my large rear pannier.Secondly, what is with the valve; it seems totally old school; something seen on camping gear from the 1960's. Not only is the inflation cap flimsily connected to the pad, I need two hands to open or close the valve.I read of one review suggesting that the pads is good for stretching - that seems appropriate.I now use the pad for car camping.The pad contains a great of mass of internal foam, it self-inflates within 10 minutes; you can hear the air being sucked inside. When the self-inflating ends, I only need one breath to top it off to an acceptable firmness.I do find the ... MorePurchased the pad for bicycle touring, but once inflated, it is nearly impossible to repack to the size from the factory. The pad takes up more than half of my large rear pannier.Secondly, what is with the valve; it seems totally old school; something seen on camping gear from the 1960's. Not only is the inflation cap flimsily connected to the pad, I need two hands to open or close the valve.I read of one review suggesting that the pads is good for stretching - that seems appropriate.I now use the pad for car camping.The pad contains a great of mass of internal foam, it self-inflates within 10 minutes; you can hear the air being sucked inside. When the self-inflating ends, I only need one breath to top it off to an acceptable firmness.I do find the exterior material to be slippery. I can't imagine remaining on the pad if camping on any sloped ground.So, while this makes a fine pad for an emergency guest bed and car camping, I believe it is far too bulky to be of value for most cycling or walking adventures, which include overnight camping.
One of the most comfortable pads I've slept on. Pretty good weight to comfort ratio too.That said, it's listed here at 1lb 5oz, but right on the package it says 22.9 oz (1lb 6.9oz), and that's the pad only: I don't entirely trust the fabric to resist punctures - it's pretty lightweight - so I'll be carrying the included patch kit; add another couple oz. Then there's the stuff sack, which is important for the same reason as the patch kit, so throw another ounce on the scale. Suddenly I'm over 1lb 10oz. I bought this to try to lighten up from my 25 yr old Thermarest, which weighs in its stuff sack 1lb 12oz and is bombproof enough for me to never bother carrying a patch kit, so I'm pretty disappointed. I think some truth in advertising would be nice here.And that ... MoreOne of the most comfortable pads I've slept on. Pretty good weight to comfort ratio too.That said, it's listed here at 1lb 5oz, but right on the package it says 22.9 oz (1lb 6.9oz), and that's the pad only: I don't entirely trust the fabric to resist punctures - it's pretty lightweight - so I'll be carrying the included patch kit; add another couple oz. Then there's the stuff sack, which is important for the same reason as the patch kit, so throw another ounce on the scale. Suddenly I'm over 1lb 10oz. I bought this to try to lighten up from my 25 yr old Thermarest, which weighs in its stuff sack 1lb 12oz and is bombproof enough for me to never bother carrying a patch kit, so I'm pretty disappointed. I think some truth in advertising would be nice here.And that said, I'll probably keep it just because it's so amazingly comfortable, and carry some tenacious tape instead of the Sea to Summit patch kit with its tube of silicone.Last, the valve is very clever and easy to use, but does not inspire confidence for durability and longevity. I'm hoping I'm wrong on this one; time will tell.Four stars strictly for comfort and ease of use, and a nod to the fact that even with the added weight, it's really light for what it delivers.
| R-Value | 3.1 | ASTM F3340−18 |
| External Dimensions | 183L x 51W cm |
| Packed Dimensions | 28L x 14W x 14H cm |
| Mat Thickness | 5 cm |
| Fill Material | Delta Core PU Foam |
