UPF 50+ SUN PROTECTIONthe fabric has passed UPF test,could block 98.5% or more of sun UV rays. meanwhile is light and ventilated to keep you cool in summer - 3.9" wide brim supply enough sun shade for your face and neck from sun uv ray.Packable & Lightweight: Crushable fabric can easily be packed for travel,could even be tucked into your POCKETS.Great for beach, pool, fishing, hiking, camping, walking, hunting, gardening or any outdoor sports and activities.Fabric: 100% Cotton; Lining: 82% Polyester, 18% CottonHand Wash OnlyFastening: DrawstringDETACHABLE CHIN STRAP: adjustable for a secure fit; won't blown off when it gets windy.