Engineered for fit, function & flexibilityThese vests feature O Neill s engineered fit, durability and no-nonsense function at an incredible value. The multi-density design combines flexibility with core insulation. Features a durable exterior, lightweight fluid foam neoprene shell, overlock-stitched bullet-proof seams and mesh for quick drainage. Front zipper makes it easy to don, and it has quick-release dual safety buckles. Multi-density design combines flexibility with core insulation Durable lightweight fluid foam neoprene shell