SJ510X 3 SJ510X 3 Quilted Reversible Jacket with Zip Off Sleeves X Back Size:3X insulation and superior heat protection Clute which leads to better insulation and superior heat protection Clute cut provides a roomy fit Straight thumb increases comfort in closed fisted work Nap out finish for heat resistance Knuckle strap for extra protection Band Top cuff helps protect wrist area and allows for easy on and off Starched gauntlet cuff for added forearm protection Equipped with high fidelity speakers and CSA Z96 Class 2 Level 2 Meets multiple standards when worn as a high visibility jacket including Type R Class 3 as the high visibility jacket