Built with Tactical 5.11 ripstop fabric, the Boonie has ventilation eyelets and a wicking sweatband to help you keep a cool head under the hottest of circumstances. Teflon finish for stain and soil resistance. This hat features: traditional boonie format with 5.11 accent, wicking jersey sweatband, hidden pocket in crown, chin cord and metal eyelets for breathability. Brim has lightweight interlining and has 7 rows of topstitching. Material: Polyester, Cotton.