From the manufacturer

The Capitan E is Black Diamond's bomber, ultra-durable helmet. 

It provides added coverage on both the sides and back while maintaining a sleek, cradle-like fit for all-day comfort. Constructed with 30% recycled materials, the Capitan E reduces impact while maintaining a high level of durability. The helmet features a 2-piece shell construction with a rigid, energy-absorbing EPS foam puck on top and softer, semi-rigid EPP foam sides. With this, the Capitan E meets the proposed UIAA increased side and back protection requirements. The Capitan’s vents provide ample breathability when temps heat up, and a low-profile suspension system helps you dial in the fit. The integrated headlamp clips with an elastic keeper on the back secure your light so you can push through the night.

Features

• EPP + EPS 2-piece recycled and DuraPET shell combo creates ultra-durability
• 30% recycled material construction by weight
• Increased side and back protection
• Low-profile suspension system
• Integrated headlamp clips
• Removable bamboo fiber pads

Specifications

• Weight: 
  • S/M: 320g
  • M/L: 350g
• Material(s): 35% ABS, 23% EPP, 18% DuraPET, 7% Nylon, 5% EPS, 4% Polyester, 2% Polycarbonate, 2% Bamboo Face Fabric, 1% POM, 1% Stainless Steel