Tactical Head Wear/Boonie Hat Cap For Wargame,Sports,Fishing & Outdoor Activties (Hill Camouflage) Block out 98% of harmful UVA and UVB rays Four vent holes keep your head cool. Side Eyelids and Pop-in Button for Easy Conversion to Sheriff / Cowboy Style Boonie Hat. Adjustable Chin Strap. Super light and fully flexible, this hat is foldable. So it is very convenient to take it anywhere.