The Salomon Trail Warm Sleeve utilizes Actilite Smartknit lycra fabrics to provide light and comfortable arm protection for cooler weather runs. ClimaUV50+ is also built in, allowing the Trail Warm Sleeve to dry quickly while blocking the sun's harmful rays. These silky, soft fabric sleeves are also simple to put on and take off. They roll up easily when not in use so you can stow them in a pack or hipbelt pocket. Composition sleeve: Polyam 78%, Elastane 22%. Weight 60g/2,12oz.