Glacier Tek’s cool vest using completely biodegradeable Renewable Phase Change Material (RPCM®) contains no hazardous materials and has achieved patent-pending status. The vest shown features a fabric shell made from Banox® with arc-flash resistant and fire-retardant properties. The RPCM Cool Vest maintains a dry, comfortable 60°F temperature for up to 2-1/2 hours.Glacier Tek, Inc., Melbourne, FL.