DoSmart 4Pairs Cooler Arm Sleeves for Bike/Hiking/Golf UV Protection (gray) Cooler than Bare Skin. Perfect for All Outdoor & Indoor Activities even Work-space About 14.9" long, 3" diameter for upper arm, 2" for wrist UV Protection over 98% Unisex and one size fits most Good for Driving Jogging Cycling Golf Claiming Fishing and all other outdoor activities