UPF 50+ rated material will protect your skin from harmful ultraviolet rays This unstructured cap features 3-panel foldable bill design, that can be folded and fit into any pocket, back pack, or hand bag Breathable and moisture wick material keeps you cool and dry. The adjustable and stretchy strap, combined with the plastic buckle keeps you comfortable without tugging on your hair. One size fits most: Numeric Size: 6-3/4''-7-5/8'' For head circumference: 21-1/4''-24''. The bill is 3-1/2 inch in length (Standard).