Best Cooling Arm Sleeves: UPF 50+, Drops Skin Temp 2–3°C
Tested over 8-hour hikes and rides: UPF 50+ nylon-spandex sleeves block 98% of UV rays, cool skin 2–3°C, and stay put from 16.3″ to 48″. Compare top picks.

Tested over 8-hour hikes and rides: UPF 50+ nylon-spandex sleeves block 98% of UV rays, cool skin 2–3°C, and stay put from 16.3″ to 48″. Compare top picks.