Sizes: XXS - 5XL, 7XL; Fabric: 100% Cotton Twill - 160 gsm; Features: 160 gsm mid weight Cotton twill to keep you cool while still being toughenough for any job,Underarm and upper back mesh vent inserts tokeep you cool in any environment,Bio Motion tape configuration toimprove recognition of human shape at distance,NSW rail compliantX back taping configuration,Two chest pockets with button closuresand pen partition;