It is constructed with a foam liner and a thermoplastic shell. Extensive testing verifies that Giro helmets meet the various shock absorption, penetration, strap strength and coverage provisions of specific US and International headgear standards. Specific standard designations can be found inside your helmet. READ THESE WARNINGS 1. All safety equipment has limitations. Read and follow all instructions carefully. 2. This helmet is intended for only the following activities: skiing and snowboardi