UA Windup offers sleek and sporty styling for the younger athlete. Engineered with screw-less hinges and a light yet durable frame, UA Windup offers the ultimate performance package in youth eyewear. Impact resistant youth lenses filter out 100% of harmful UVA, UVB, and UVC rays. NEW UA Tuned Golf lens allows the wearer to see moving objects with greater detail and gauge depth perception more accurately on the course. - See It Better. Read It Better. NEW UA Tuned Golf lenses provides contrast enhancement which helps you to read the course more precisely and track the ball easier. - ArmourSight lens technology provides enhanced, distortion-free vision edge-to-edge. - Mirror coatings guard lenses against scratches, smudges and intense sunlight. - All UA Eyewear defends against 100% of harmful UVA/B/C rays. - ArmourFusion Frames are built with high grade injected polyamide for maximum strength and durability. - Three Point Grip means a no-slip fit, providing ultimate comfort through fused megol rubber on temples and nose pad. - Screwless cam-lock hinges allow temples to lock securely into place for a sturdy and extremely lightweight fit - All Under Armour Eyewear is protected for life against manufacturer defects.