ST21 3 ST21 Class 3 Long Sleeve T Shirt with Max Dri™ Hi Vis Orange The mesh upper front and 9JM The mesh upper front and back provide breathability and comfort while the tough woven twill fabric used for the pockets enhances durability 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 Gauntlet cuff for added forearm protection Radians ST21 Class 3 Long Sleeve Safety T Shirt is made with Max Dri™ which is an arid Birdseye Moisture Wicking Mesh allowing for maximum breathability making the safety T shirt wear much more like a regular T shirt