Prickly Pear Ventilator Mesh from Boco From Boco: Now with ventilator mesh for enhanced cooling, the BOCO Run Hat offers a great combination of technical fabrications to keep you focused on your run or your race. Description * Lightweight wicking woven polyester material provides a layer of protection from mother nature on the front and top panels. * Ventilator mesh side panels keep your head cool for the length of your workout. * Soft polyester mesh wicking sweatband on the inside to help move sweat away from your head keeping you focused on the trail or road. * Adjustable back snap buckle with tuck in pocket for any excess keeping the back of your hat tidy. * Updated styling with sublimated designs * Black underside of the bill to reduce glare * Curved bill * One size fits most * Machine washable