30% COOLMAX polyester powerfully wicks away sweat, evaporates it to keep you cool on the job 7.7-oz. fabric is 67% cotton Fire Hose canvas; it's extremely abrasion resistant Our first ever COOLMAX Fire Hose with flex - 3% spandex moves with you when you lunge and stretch Bonus Room™ waistband has hidden stretch built in - adapts for comfort when you need it to Crouch Gusset® lets you hunker down without pinching your privates 12 pockets, including utility pocket and 5-in-1 cargo multi-pocket with in-or-out tuckable flap for easy access to tools and fasteners Relaxed Fit – same generous Tradesman Fit you love, now with a new name. Sits at the waist, and generously sized for ease of movement on the job.