Designed to offer protection against damaging UV rays these knee skins perform great in warm conditions, but also offer added protection in cooler conditions. Perfect for days in the mountains of hot exposed climbs and cool descents. Castelli can officially only rate these warmers at UPF 50+, but in their laboratory tests they actually blocked 99.8 percent of damaging UV rays. Using a polyester base they found this it is not only more effective than nylon at blocking UV rays but is also much better at keeping you dry, which means these skins are better in both cooler and warmer conditions. Castelli have kept the construction very clean to eliminate seams that can rub, and used double-sided silicone elastic to make sure they stay in place. They fold up extremely small, so they’re great to stick in your pockets for your next big mountain day. About Leg & Arm Warmers During the Spring and Autumn months, arm, leg and knee warmers are an essential part of a cyclists kit, giving the versatility to cope with unpredictable changes in weather. They are small enough to be carried in a jersey pocket, meaning quick and easy changes can be made while out on the bike. Arm, leg and knee warmers are available in various weights to suit your requirements and the weather conditions you are riding in.
Designed to offer protection against damaging UV rays these knee skins perform great in warm conditions, but also offer added protection in cooler conditions. Perfect for days in the mountains of hot exposed climbs and cool descents. Castelli can officially only rate these warmers at UPF 50+, but in their laboratory tests they actually blocked 99.8 percent of damaging UV rays. Using a polyester base they found this it is not only more effective than nylon at blocking UV rays but is also much better at keeping you dry, which means these skins are better in both cooler and warmer conditions. Castelli have kept the construction very clean to eliminate seams that can rub, and used double-sided silicone elastic to make sure they stay in place. They fold up extremely small, so they’re great to stick in your pockets for your next big mountain day. About Leg & Arm Warmers During the Spring and Autumn months, arm, leg and knee warmers are an essential part of a cyclists kit, giving the versatility to cope with unpredictable changes in weather. They are small enough to be carried in a jersey pocket, meaning quick and easy changes can be made while out on the bike. Arm, leg and knee warmers are available in various weights to suit your requirements and the weather conditions you are riding in.
Designed to offer protection against damaging UV rays these knee skins perform great in warm conditions, but also offer added protection in cooler conditions. Perfect for days in the mountains of hot exposed climbs and cool descents. Castelli can officially only rate these warmers at UPF 50+, but in their laboratory tests they actually blocked 99.8 percent of damaging UV rays. Using a polyester base they found this it is not only more effective than nylon at blocking UV rays but is also much better at keeping you dry, which means these skins are better in both cooler and warmer conditions. Castelli have kept the construction very clean to eliminate seams that can rub, and used double-sided silicone elastic to make sure they stay in place. They fold up extremely small, so they’re great to stick in your pockets for your next big mountain day. About Leg & Arm Warmers During the Spring and Autumn months, arm, leg and knee warmers are an essential part of a cyclists kit, giving the versatility to cope with unpredictable changes in weather. They are small enough to be carried in a jersey pocket, meaning quick and easy changes can be made while out on the bike. Arm, leg and knee warmers are available in various weights to suit your requirements and the weather conditions you are riding in.
Designed to offer protection against damaging UV rays these knee skins perform great in warm conditions, but also offer added protection in cooler conditions. Perfect for days in the mountains of hot exposed climbs and cool descents. Castelli can officially only rate these warmers at UPF 50+, but in their laboratory tests they actually blocked 99.8 percent of damaging UV rays. Using a polyester base they found this it is not only more effective than nylon at blocking UV rays but is also much better at keeping you dry, which means these skins are better in both cooler and warmer conditions. Castelli have kept the construction very clean to eliminate seams that can rub, and used double-sided silicone elastic to make sure they stay in place. They fold up extremely small, so they’re great to stick in your pockets for your next big mountain day. About Leg & Arm Warmers During the Spring and Autumn months, arm, leg and knee warmers are an essential part of a cyclists kit, giving the versatility to cope with unpredictable changes in weather. They are small enough to be carried in a jersey pocket, meaning quick and easy changes can be made while out on the bike. Arm, leg and knee warmers are available in various weights to suit your requirements and the weather conditions you are riding in.
Last updated at 03/21/2026 17:34:48
Castelli UPF 50 + Light Arm Sleeves | Sun Sleeves & Apparel | Bicycle Superstore White / Large
Delivery $9.95
Castelli UPF 50+ Light Arm Sleeves in White
Delivery $15
Castelli UPF 50+ Light Arm Sleeves in White
Delivery between 27 Mar – 2 Apr $28.39
originally posted on altitude-sports.com
I’d say it met all expectations. They aren’t cheap, but made in Italy is good for likely better labour conditions and less environmental damage. They do save your skin. You may get some lines on the skin where there is a wrinkle. The white one definitely takes dirt like something white would, so keep that in mind.
originally posted on altitude-sports.com
Now being immuno suppressed, I've been told I have to be even more careful protecting my skin from UV rays. These are a great alternative to sunscreen and work exactly as expected. I'd gladly buy the knee skins too, but unfortunately they seem to ride too high like regular knee/leg warmers, resulting in the dreaded sausage thighs...
originally posted on sigmasports.com
I took these on the Transcontinental as sun protection and for early morning starts. They were the business. I wore them for all but 50 of the 4,000km, more than any other bit of kit (apart from my helmet of course). Sufficient UV protection and kept me cooler from the unrelenting sun (consecutive days of 36C+ peaking at about 40C).They were used and abused, including three crashes and occasional sink washing. The white colour in these conditions has got pretty grubby but I wouldn't get black to use in the sun. Unfortunately my pair are now grey with road muck, a bit of blood and scuffed & torn on one side from the crashes, so I will buy another because they were so handy.
| Washability | 30°C |
| UV protection | 50+ |
| Temperature range | 8° - 18°C |
Castelli UPF 50 + Light Arm Sleeves | Sun Sleeves & Apparel | Bicycle Superstore White / Large
Delivery $9.95
Castelli UPF 50+ Light Arm Sleeves in White
Delivery $15
Castelli UPF 50+ Light Arm Sleeves in White
Delivery between 27 Mar – 2 Apr $28.39
I’d say it met all expectations. They aren’t cheap, but made in Italy is good for likely better labour conditions and less environmental damage. They do save your skin. You may get some lines on the skin where there is a wrinkle. The white one definitely takes dirt like something white would, so keep that in mind.
Now being immuno suppressed, I've been told I have to be even more careful protecting my skin from UV rays. These are a great alternative to sunscreen and work exactly as expected. I'd gladly buy the knee skins too, but unfortunately they seem to ride too high like regular knee/leg warmers, resulting in the dreaded sausage thighs...
I took these on the Transcontinental as sun protection and for early morning starts. They were the business. I wore them for all but 50 of the 4,000km, more than any other bit of kit (apart from my helmet of course). Sufficient UV protection and kept me cooler from the unrelenting sun (consecutive days of 36C+ peaking at about 40C).They were used and abused, including three crashes and occasional sink washing. The white colour in these conditions has got pretty grubby but I wouldn't get black to use in the sun. Unfortunately my pair are now grey with road muck, a bit of blood and scuffed & torn on one side from the crashes, so I will buy another because they were so handy.
I got the black pair. They work pretty well in the sun, I was worried that the black would heat up too much. However they are very comfortable. I got size Large, which is 44cm long and 13cm at the top and 8cm at the bottom.
These sleeves are exactly what I was looking for. I am a small woman and ordered the unisex small. They fit perfectly. They keep the sun rays out without adding extra warmth. The silicon at the top ensures that there is no slippage. I’m very pleased with them.
Have worn these constantly since buying them on all day rides in scorching heat and they worked a treat. Despite being an additional layer I felt cooler without the heat of the sun on my skin and nice to know my skin was protected from the suns rays too so win win. Saves putting on sticky suncream which just attracts the dirt. I have worn them mainly off road on dusty tracks and despite buying white they have come up clean in the wash so far though black might be more practical long term I guess. Sizing was accurate. I am so happy with them that Ive just bought the leg sleeves as well to wear on scorching hot days.
The perfect UPF arm protection, better than sunscreen which I hate getting all over the inside of my car. Elastic at top keeps the sleeve in place all the time. I have tried other brands which fail at this. I have worn them on high heat days and stayed cooler and less sweaty than riders with bare arms. I use them for golf and cycling. They also prevent chill on cooler days.
After wearing mine practically every day for about 2 hours each day for about three years, it's time to replace them. The weave has loosened and so they aren't as tight anymore. Does an excellent job of keeping out the UV rays and you see it in the tan lines. I wear mine to protect my sleeve tattoo and the colours are still very intact. As another review said, they do seem to size smaller so the large that I just ordered needs to be returned for an extra large. The silicon at the top does exactly what it's supposed to do, even after all these years - keeps the sleeve in place. Too bad I seem to be having a tough time ordering the black set.
I bought these for an unaided ride from London to Paris where I didn't have space to carry sun lotion. All I can say is they are amazing! They protected my arms across two days of hard riding in the sun and I never once felt like I was overheating. They kept me warm when needed first thing in the morning and cool as the sun became hotter. I also paired them with the Castelli leg protectors as well and they work equally well too. I certainly don't now leave home without them when the forecast says sun!
A lot of size to choose from. I got the XL one that fits me without cut off circulation. some cheap one is one size only.I use it for hiking and road trip to. Saved my arm from some serious sunburn.
| Washability | 30°C |
| UV protection | 50+ |
| Temperature range | 8° - 18°C |
