Revo RG 7007 Echo Polarized Ski Goggles plastic Imported Adjustable, stylish strap is constructed with anti-slip silicone breads to stay put Unrivaled peripheral vision for an optimal field of vision on the slopes Air-vent Technology for optical air flow inside and out, our air-vent Technology reduces fogging Triple layer foam Protection for a secure, comfortable fit that doesn't sacrifice function or flexibility Dual lens offers two layers of lenses help prevent fogging