The ZANheadgear SportFlex(tm) Series Arm Sleeve is heavier than the standard arm sleeve, with a softness & comfort that surpasses any competitor. We've added functional reflective tape for visibility and safety on all of your adventures. Perfect to wear as protection from the sun or to keep warm in the cold. Lightweight and machine washable, available in Small, Medium, Large & XLarge. 50+ UV Protection.