Made for golfing in the extreme heat. Ventilation all-around and a cool-to-the-touch Iso-Chill sweatband, built right in. Durable woven fabric provides a flexible fit & feel Spacer mesh back panel & laser-perforated side panels for all-around ventilation Iso-Chill sweatband helps disperse body heat, making it feel cool to the touch Stretch fit design for customized comfort 90% polyester/10% elastan