The O'Brien 4-buckle Pro Men's Buoyancy Aid - Excellent quality nylon buoyancy aid. Ideal for all low-impact water sports. Soft, flexible foam core for outstanding comfort. This jacket has front , back and additional side foam protection panels for superior protection. Sturdy ripstop nylon exterior for durability. 4 buckles webbing straps with quick release closure, fully adjustable, for security and excellent fit. Big armholes allow a wide range of motion - superb for activity watersports.