The Fire Resistant Kool Max Zipper Vest with Indura(TM) effectively cools the torso and body and is ideal for hot and flammable job sites. The vest is made of Indura(TM) fire resistant fabric. Water-based Kool Max Cooling Packs are non-flammable. Kool Max Cooling Packs are reusable, non-toxic, and water-based and provide constant cooling energy for up to 3.5 hours. Includes four (4) 6"x 14" segmented packs. Packs fit into insulated pockets inside the vest. The pockets have a comfortable all-cotton fabric to protect the skin and an insulated outer composite fabric to direct the cooling energy toward the body. Unisex vest with V-neck with zipper-pull front. Color: Blue. Sizes: M/L, L/XL, XXL. Keep an extra set of packs in the freezer to extend cooling time!