This helmet features a multi-impact design to absorb and dissipate energy in swift water rescue situations. Adjusts easily to fit any team member with adjustable O-brace tabs. The helmet is low profile and lightweight. Designed by the Whitewater Research and Safety Institute for superior performance in fast moving whitewater.Key Features: Four-Layer design: outer shell, energy absorbing foam • Energy dissipating inner shell, energy absorbing foam • Comfort Ergonomics • Durable Outer Shell • Patented Retention System • 3 Sizes • Multiple Vents