The Expander sleeping bag liner is made of a super soft and stretchy knitted poly-cotton material. The Rectangular, Traveller and Double models don't have side seams and, combined with the stretch fabric, this offers an unprecedented level of comfort in a budget-priced liner. A built-in antimicrobial treatment keeps odors at bay - and it won't wash out of the liner when it's thrown in the washing machine. This is the perfect travel companion for those looking for a luxuriously comfortable sleep. Features Stretchy, wicking Jersey-knit poly-cotton fabric, knitted without side seams for extra comfort. The antimicrobial finish keeps the liner fresh and odor-free. Easy care – machine wash with no special soap needed. Avoid fabric softeners and dryer sheets. Keeps sleeping bag clean. Packs into its own storage case.
The Expander sleeping bag liner is made of a super soft and stretchy knitted poly-cotton material. The Rectangular, Traveller and Double models don't have side seams and, combined with the stretch fabric, this offers an unprecedented level of comfort in a budget-priced liner. A built-in antimicrobial treatment keeps odors at bay - and it won't wash out of the liner when it's thrown in the washing machine. This is the perfect travel companion for those looking for a luxuriously comfortable sleep. Features Stretchy, wicking Jersey-knit poly-cotton fabric, knitted without side seams for extra comfort. The antimicrobial finish keeps the liner fresh and odor-free. Easy care – machine wash with no special soap needed. Avoid fabric softeners and dryer sheets. Keeps sleeping bag clean. Packs into its own storage case.
The Expander sleeping bag liner is made of a super soft and stretchy knitted poly-cotton material. The Rectangular, Traveller and Double models don't have side seams and, combined with the stretch fabric, this offers an unprecedented level of comfort in a budget-priced liner. A built-in antimicrobial treatment keeps odors at bay - and it won't wash out of the liner when it's thrown in the washing machine. This is the perfect travel companion for those looking for a luxuriously comfortable sleep. Features Stretchy, wicking Jersey-knit poly-cotton fabric, knitted without side seams for extra comfort. The antimicrobial finish keeps the liner fresh and odor-free. Easy care – machine wash with no special soap needed. Avoid fabric softeners and dryer sheets. Keeps sleeping bag clean. Packs into its own storage case.
The Expander sleeping bag liner is made of a super soft and stretchy knitted poly-cotton material. The Rectangular, Traveller and Double models don't have side seams and, combined with the stretch fabric, this offers an unprecedented level of comfort in a budget-priced liner. A built-in antimicrobial treatment keeps odors at bay - and it won't wash out of the liner when it's thrown in the washing machine. This is the perfect travel companion for those looking for a luxuriously comfortable sleep. Features Stretchy, wicking Jersey-knit poly-cotton fabric, knitted without side seams for extra comfort. The antimicrobial finish keeps the liner fresh and odor-free. Easy care – machine wash with no special soap needed. Avoid fabric softeners and dryer sheets. Keeps sleeping bag clean. Packs into its own storage case.
Last updated at 05/09/2026 10:11:17
Expander Liner - Long Rectangular
Free 60-day returns
Sea to Summit Expander Sleeping Bag Liner Navy Long
Delivery between 13–18 May $13.99
Sea To Summit Expander Liner Long
Delivery $13.50
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 Expander Liner Long _ Geographe Fishing and Outdoors
Sea To Summit Expander Long Liner - Navy
Sea To Summit Expander Liner Navy / Long
Delivery $9.95
Sea to Summit Expander Liner Navy / Long - Valhalla Tactical & Outdoor
Delivery $15
Sea To Summit Expander Liner LONG / Navy
Delivery between 13–20 May $35
Sea to Summit Expander Liner Sleeping Bag Liner LONG / Navy | Boss Outdoor
originally posted on seatosummitusa.com
I got this for my son for Boyscouts instead of sending him with a much bulkier and heavier twin sheet set because we do so many hiking and camping trips where he carries his own weight. He used it on a 4-day trip where we hammock camped. To save weight, he packed only this liner, a small lightweight travel blanket that folds into about an 8” square pillow, and a sleeping pad for his sleeping system along with his hammock. The temperature dropped from about 80 degrees F to between 50-60 at night and he stayed perfectly comfortable. He liked the liner so much he used it in his bed at home and also took it on a week-long camping trip with the Boyscouts where they slept on cots. Both of us are very satisfied with the purchase. I’m so glad he’s not having to lug around a ... MoreI got this for my son for Boyscouts instead of sending him with a much bulkier and heavier twin sheet set because we do so many hiking and camping trips where he carries his own weight. He used it on a 4-day trip where we hammock camped. To save weight, he packed only this liner, a small lightweight travel blanket that folds into about an 8” square pillow, and a sleeping pad for his sleeping system along with his hammock. The temperature dropped from about 80 degrees F to between 50-60 at night and he stayed perfectly comfortable. He liked the liner so much he used it in his bed at home and also took it on a week-long camping trip with the Boyscouts where they slept on cots. Both of us are very satisfied with the purchase. I’m so glad he’s not having to lug around a ton of weight and also so he has a layer to keep his top-layer sleeping gear clean. The ability to layer is what you need for colder trips and this is a great addition to his gear!
originally posted on seatosummitusa.com
I loved this. It's lightweight and super soft and cozy for two people, or extra luxurious for one! It's now also my go to summer sleeping bag in warm climates (Utah, Texas, even New York etc.). Whish the bag it packs in was a bittt bigger and easy to pack in, so I'd give that a 3 star, but the product itself is definitely 5.
originally posted on bcf.com.au
I love to keep things as clean as possible. Not so easy with kids right? But the sleeping bag liner is a great start to the longevity of the sleeping bag. I love that they're stretchy and can provide an extra layer in the bag or even just when it's summer and you want the option to have a light covering with the sleeping bag unzipped.
| Length | 0.17 metres |
| Shape | Rectangular |
| Outer Material | Cotton |
| Season | 3 Seasons |
| Seal material type | Cotton |
Expander Liner - Long Rectangular
Free 60-day returns
Sea to Summit Expander Sleeping Bag Liner Navy Long
Delivery between 13–18 May $13.99
Sea To Summit Expander Liner Long
Delivery $13.50
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 Expander Liner Long _ Geographe Fishing and Outdoors
Sea To Summit Expander Long Liner - Navy
I got this for my son for Boyscouts instead of sending him with a much bulkier and heavier twin sheet set because we do so many hiking and camping trips where he carries his own weight. He used it on a 4-day trip where we hammock camped. To save weight, he packed only this liner, a small lightweight travel blanket that folds into about an 8” square pillow, and a sleeping pad for his sleeping system along with his hammock. The temperature dropped from about 80 degrees F to between 50-60 at night and he stayed perfectly comfortable. He liked the liner so much he used it in his bed at home and also took it on a week-long camping trip with the Boyscouts where they slept on cots. Both of us are very satisfied with the purchase. I’m so glad he’s not having to lug around a ... MoreI got this for my son for Boyscouts instead of sending him with a much bulkier and heavier twin sheet set because we do so many hiking and camping trips where he carries his own weight. He used it on a 4-day trip where we hammock camped. To save weight, he packed only this liner, a small lightweight travel blanket that folds into about an 8” square pillow, and a sleeping pad for his sleeping system along with his hammock. The temperature dropped from about 80 degrees F to between 50-60 at night and he stayed perfectly comfortable. He liked the liner so much he used it in his bed at home and also took it on a week-long camping trip with the Boyscouts where they slept on cots. Both of us are very satisfied with the purchase. I’m so glad he’s not having to lug around a ton of weight and also so he has a layer to keep his top-layer sleeping gear clean. The ability to layer is what you need for colder trips and this is a great addition to his gear!
I loved this. It's lightweight and super soft and cozy for two people, or extra luxurious for one! It's now also my go to summer sleeping bag in warm climates (Utah, Texas, even New York etc.). Whish the bag it packs in was a bittt bigger and easy to pack in, so I'd give that a 3 star, but the product itself is definitely 5.
I love to keep things as clean as possible. Not so easy with kids right? But the sleeping bag liner is a great start to the longevity of the sleeping bag. I love that they're stretchy and can provide an extra layer in the bag or even just when it's summer and you want the option to have a light covering with the sleeping bag unzipped.
The fabric has a lot of stretch and dries quickly when damp. This is a well-constructed liner. The downside is that it is bigger than I expected and takes up a fair bit of pack real estate even when it's folded up, so it's not very backpack-worthy. Good enough for a luxurious car camp or canoe camp without portage, or handy for hostelling.
This liner is very versatile, as it can be used as a sleeping bag liner, on it's own on warmer nights, or as a case/cover for your sleeping pad. The cotton feeling is a great. Because it's so versatile it should appeal to warm weather backpackers all the way to car campers.The quality is excellent and it should yield years of service, and remember that as a sleeping bag liner, it adds life to your sleeping bag by keeping it cleaner.
The stretch knit sleeping bag liner worked well. The cotton/poly blend was comfortable against the skin. My son and I used just the liners when tent camping with night temperatures in the low 60 degrees F at night. Sleeping bag would have been too warm. Haven’t tried it yet with a sleeping bag. They dry rather quickly in the sun after getting damp the nights it rained.
Preparing my kids to travel to Iceland and Switzerland this summer. We found out that their sensitive skin broke out in a rash when we were at a Disney resort so we looked into travel liners to use at hostels. So far, we have tested it out at home and on a recent camping trip and it has been a success. It is soft, it is comfortable, it even added warmth when a cold front went through our camp site.
The material of the expander travel liner is soft and comfortable, like a nice sheet. It is so stretchy, however, that it gets twisted around me when I sleep. It almost looks like it has been sewn a little crooked, but I think that is just the material. My biggest complaint is that the extra material for the pillow is not big enough to cover a standard size pillow. I don’t know if that is normal for sleeping bag liners but that doesn’t make sense to me, since it makes it non-functional as a cover for a pillow.
I own pretty much all of these, the thermal, silk, cool max and this. It’s the best. I spend half of my nights in this. It’s roomy and stretchy and unmatched in its comfort. It doesn’t weight much more than the others and is half the price.The cool max has its place in hotter climates but I use this for everything else. Bought three of these in case they ever stop making them.
Your can read the specs on the listing page. My thoughts...trying to decide what the best use of this item is. Sleeping bag liner to keep the bag clean (and possibly add a little (likely very little) warmth to your sleep system. Use as a travelling bag when sleeping in dodgy or not so dodgy hotels, hostels or sleeping over at friends. I have been comparing this to a summer grade bag such as a Marmot 45/55 degree bag around 900 gm which is heavier than this liner at 380 gm. Both are actually not far off being the same size as the Marmot bags are compressible and the liner comes in a mesh sack without compression. Deciding which is more versatile and useful. Perhaps the liner inside the Marmot is the answer I am seeking.
| Length | 0.17 metres |
| Shape | Rectangular |
| Outer Material | Cotton |
| Season | 3 Seasons |
| Seal material type | Cotton |
