Endura windchill ii arm warmersenduras windchill ii arm warmers are made from mixed fabrics and thermolite with a tough dwr finish to provide all the weather insulation moisture wicking and comfort you need these arm warmers also benefit from an ergonomic multi panel construction and feature internal silicone bicep grippers to prevent slippage and reflective flashes and logo to aid visibility in low light conditions featuresmaterial nylon 45 polyester 42 elastane 13thermolite fabric