PCCS enhances productivity and uptime with cooling packs that energize in minutes and are lighter in weight that ice, gel or water cooled vests. When reusable PCCS Cooling packs clear formula is chilled, it ‘phase changes’ to a white semi-solid. It never turns completely solid and never gets as cold as ice. PCCS maintains 65°F that last 2-3 hours. Cooling packs slip easily into blue Proban® FR7A fabric vest. Creates a microclimate that keeps cooling against body in and keeps extreme environmental heat out. Vest includes PCP1 Pair of PCCS Cooling Packs, one for front and one for back of vest. Color: Blue with Reflexite, Hi-Viz Yellow Trim. Size: One size fits most with hook and loop adjustments at shoulders and hook and loop horizontal closures. Sold by the each.