Ergodyne Chill-Its 6202S Vest Only, Small/Medium, Khaki Phase Change Vest Only -S/M Durable Banox FR3 cotton fabric carrier with flame-resistant properties Banox FR3 Fabric passes ASTM F1506; ATPV of 9.4 cal/cm (HRC 2) Anatomical over-the-shoulder design conforms to the body for improved comfort