The Feedback Flannel Cap rethinks our favorite heavyweight flannel fabric into a cozy stylish cap perfect for those chilly morning hikes when you need a little extra warmth. The polyester fabric is quick-drying and wicking, and the metal clasp adjustment on the back ensures a comfortable, customized fit. UPF 50+ protects your head from the sun's harmful rays, making this an ideal choice for both winter and summer days. FABRIC : bluesign® approved 100% Polyester