BD Black Diamond Dash Cap is a perfect cap for outdoor activity! I took it to use during climbing, trekking, running or other while always remaining protected from UV rays. Made of polyester it also features a breathable band and a breathable UV-resistant fabric to protect you from the sun, keep you dry and dry fast. The size is one size, but there is a comfortable adjustment on the back. The reflective logo makes you visible even when your activities are long and the sun goes down. BD Black Diamond Dash Cap hat