Designed for mountain training across a range of conditions, the Calvus Cap provides sun protection, water resistance, and moisture management on the move. The Socora™ polyester fabric is light, air permeable, and wicks moisture. Polydel™ mesh side panels and the Spacermesh™ sweatband add next level comfort, and a DWR (durable water repellent) treatment adds a layer of protection from light rain. The adjustable stretch closure strap with a low profile quick release buckle secures the fit without binding.