The Insect Shield Hat helps protect you from mosquitoes, ticks, no-see-ums, and other biting insects during all your outdoor adventures. Wide, down-sloping brim provides excellent rain protection. Certified with a UPF 50+ rating to block 98% of harmful UVA/UVB radiation. Treated with an odorless, invisible Invisible Shield repellent bonded to 100% cotton duck fabric, this hat keeps performing after repeated washings. Fits gently, but won't fly off in the wind thanks to its tuck-away adjustable wind cord. Hat floats thanks to a layer of closed-cell foam in the crown. Hidden pocket inside crown with Velcro closure. Crushable and packable for easy storage. Guaranteed for life not to shrink, wear out, or fall apart. Brim measures 3-1/2" in the front and back and 2-1/2" on the sides. Weighs 5.5 oz.