The Vahstro features Optic Nerve's SideSwipe technology, a small switch-like apparatus that allows you to quickly change lenses with minimal handling. The Vahstro includes four interchangeable lenses for optimal vision in almost any light conditions. The polycarbonate lenses provide 100% UV protection and repel water, dust, and oil. It has a lightweight TR90 wrap frame for a secure fit. Features: - Includes 4 Sets of Interchangeable Polarized Lenses: Smoke, Copper, Orange with Blue Flash, and Clear - TR90 Nylon Frame Materials - Fits most face shapes - Compatible with RX adapter - Hydrophobic lens coating to repel water, oil, dust, and sweat - 100% UVA/UVB Protection - Meets ANSI Z80.3 standards for optical clarity and impact resistance - Soft case included