The ZANheadgear SportFlex Series Arm Sleeve is heavier than the standard arm sleeve, with a softness & comfort that surpasses any competitor. 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. Black. Materials: 87% Polyester, 13% Elastane.