|Occunomix Pccs Phase 1 FR Vest w/Pair Cooling Packs PC1. When heat stress poses a serious threat, or when an employee has suffered a heat stress condition, PCCS delivers a serious solution. Vest fabric Proban FR7A Blue, 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.Maintains 65¦ Fahrenheit/18¦ Celsius Cooling that lasts 2-3 hours. Duration may vary with conditions.Shirt Style. Approx. 3.5lb, includes more than 20ö Reflexite. One size fits most with hook and loop adjustments at shoulders and hook and loop horizontal closures. Often preferred by women.Replacement cooling packs and outer vest also sold separately.