Durable Evoprene outer shell Beveled soft PVC (front) foam flotation for maximum comfort Advanced air-foam technology Segmented Evoprene panels for increased flexibility Lumbar protection pad Front-zip entry Strategically placed drain panels 2 heavy-duty 1.5" belts with durable quick-release buckles Sizing: US Coast Guard-approved life vest sizing should be taken at the widest part of the chest or stomach while sitting down. Properly fit life vests differ from your typical clothing size and should not be based on personal tight or loose fit preferences.