Alpinix 37.5 Wool 6-Panel Cap Charcoal GreyA six panel sports cap cut from lightweight Alpinix 37,5 Wool in a shallow fit. 37. 5 utilizes natural mineral technology maintaining an ideal core temperature and removing sweat at vapor stage. The technology is embedded into the recycled polyester fiber and will never wash out. Alpinix fabric integrates high performance and low maintenance for versatile wear. The fabric features a dry touch and durable texture due to its blend of compact woven wool,