Pure and simple, the YTV incorporates Astral&';s freestyle inspired Torso Lock(TM) foam platform. A low-profile fit offers plenty of mobility to a wide range of paddlers and sailors. Technical Details:- Intended Use: Whitewater / Tour / Sailing / SUP Entry: Pullover Foam Insert: PVC Free GaiaA(R)& PE Foam Shell Fabric: 200 x 400 Denier Ripstop Nylon Liner Fabric: 200 Denier High Tenacity Nylon Webbing: Polypro Zipper: YKKA(R) Self Locking Vislon Teeth Hardware: Heavy Duty Acetal Weight: 1.76 lbs / 28.16 oz / 798.32 gr Sizing: S/M = 31-37" M/L = 38-44" L/XL = 45-51" Design Buoyancy: 16.5 lbs Approval Type: USCG Type V