Mens Lightweight Bio Motion Shirt**Sizes:** XXS 5XL, 7XL **Fabric:** 100% Cotton Twill 150 gsm **Features:** 150 gsm lightweight cotton twill for comfort and breathability Bio motion arm taping for improved recognition of the human shape at a distance Underarm mesh vent inserts to keep you cool in various environments Two chest pockets with button closures and a pen partition Fade tested for lasting color retention.