Cooling Vest With PCM Inserts Product Description: Ru Entropy supplies classic cooling vests with inserts. Our regular supply are 4 cells & 8 cells PCM inserts with paraffin wax PCM filling materials. Specification: Brand Name: PCMCOOL Size: One size to fit most Weight: 1.5~1.8kg (with one set of PCM inserts, 4 pieces) Cooling Time: Up to 4 hours depending on the environment temperature PCM: PCM15, PCM18, PCM23 & PCM28 composite Filling material (Customized temperatures are available) Fabric: High Quality TPU, Polyester PCM Inserts: single cell, 4 cells, 8 cells, or customized shapes