Removable Lens System - VLT's removable lens system offers spare lenses in different colors to suit different weather conditions and personal preferences when skiing, snowboarding or other winter sports. Professional Ventilation and Frameless Design - Designed to reduce fogging and optimize air flow within the lens. Ski goggles offer a smooth airflow system that pulls in fresh air and expels moisture quickly and efficiently. Large spherical rimless lenses provide truly unobstructed, clear vision of slopes. Removable Strap Helmet Compatibility - Extra long elastic strap for any helmet compatibility. It makes these the perfect goggles for men, women, and teenagers. Compatible with prescription glasses - roomy interior! Eyeglass-friendly design fits most prescription glasses. Visibility first!