Economy RPCM Cool Vests The Economy RPCM Cool Vest is constructed of a heavy duty nylon mesh outer shell which uses the same RPCM Cool Packs as our other RPCM Cool Vest models. The Economy RPCM Cool Vest is available in the colors Safety Orange and Safety Blue. The Economy Cool Vest incorporates adjustable straps on each side of the garment for a custom fit (consult pictures for exact strap types). They maintain a cool, constant 59°F temperature for up to 2 1/2 hours, weigh less than 5 lbs., and recharge in minutes. Get an extra set of RPCM Cool Packs so you will always have a set ready to use!