Gul 4 Buckle Adult Impact Vest 50N Buoyancy Aid BLUE with durable Rip-Stop CE approved nylon, Front body panels: 6 layers of CE approved 5mm PE foam, 4 adjustable polypropylene, durable webbing straps and Highly durable straight stitch seams. Available Sizes: S, M, L, XL. Small fits: Chest:- 32" - 35" , Medium fits chest:- 36" - 39" , Large fits chest:- 40" - 43" and XLarge fits chest:- 43" - 46".