Edelweiss Venturi Foam Kit. Durable polycarbonate shell with EPS inner foam. Fit for all climbing activities.Dial in the sizewith a wheel adjustment. Headlamp clips to secure your lighting. Package Contents: Edelweiss Venturi Helmet The Edelweiss Venturi Helmet is a quality addition to the Edelweiss lineup. For more great deals on Climbing & Mountaineering Equipment by Edelweiss please browse our Edelweiss Climbing & Mountaineering Equipment page.