The Endura Engineered Arm Warmers are body mapped, mid weight warmers. Engineered construction provides pre-shaped comfort without additional seams they’re high elasticity for an unrestrictive fit and a varied pattern provides high breathability that maintains body temperature. Endura Engineered Arm Warmers Features  Engineered construction provides pre-shaped comfort without additional seams High elasticity for an unrestrictive fit Varied pattern provides high breathability that maintains body temperature Single seam, lightweight packable design Endura Engineered Arm Warmers Materials Nylon 87% / Elastane 10% / Polyester 3%