This is what happens when ultra-stretchy fabric is engineered for ultimate ventilation. Not only does it move with you in every direction, it also keeps you nice and cool on those super-hot rounds. Loose: Fuller cut for complete comfort Perforated woven construction for superior ventilation Soft anti-pick, anti-pill fabric pieced in at collar, placket & cuffs 4-way stretch construction moves better in every direction Material wicks sweat & dries really fast Heat seal logos 83% Polyester/17% Elastane