Core Features Mountaineering sunglasses for the modern explorer. Part of Sunski's Alpine collection, a classic aviator shape meets the iconic glacier goggle. Removable magnetic sun shields protect your eyes from side glare, while perforations prevent fogging and enhance peripheral vision. Best Uses: Backcountry & Downhill Skiing Hiking Rock Climbing Water Activities Red Dot Design Award Winning Polarized Lenses Removable Magnetic Sun Shields SuperLight Recycled Frames All-Day Comfortable Fit Lifetime Warranty Design and Fit The Treeline is a medium sized frame that fits most head sizes and shapes. Sculpted nose-pads and arms are designed to provide just the right amount of grip without causing discomfort ensures a comfortable fit in all elements. Fit check: sun shields should fit close to the face without creating pressure. Weight: 28.1 gramsWrap & Angle: Maximum Temple Width: 141 mmBridge Width: 22 mmLens Width: 50 mm Lens Specs With Sunski Helio polycarbonate lenses, all Treelines are polarized, block 100% UVA/UVB/UV400 wavelengths and pass the FDA basic impact test. Featuring a wide range of VLT (Visual Light Transmission), including Sunski's darkest lenses. Eye Coverage: Very Good Lens specs:Slate: Non-mirrored, Grey tint, 9% VLT, Base 6 curveAmber: Non-Mirrored, Amber tint, 12% VLT, Base 6 curveForest: Non-Mirrored, Green tint, 11% VLT, Base 6 curveSilver: Mirrored, Grey tint, 11% VLT, Base 6 curveBronze: Mirrored, Amber tint, 10.88 % VLT, Base 6 curveBronze CAT 4: Mirrored, Amber tint, 5.37% VLT, Base 6 curve Features Protective Sun Shields Pop in, pop out magnetic sun shields keep your eyes safe from sun, snow, wind and dust while tiny perforations maximize comfort and breathability. Kiss your foggy goggles goodbye. Ultralight Frames Leave the pressure points and headaches back at the trailhead. Sunski's lightweight frame material is ultra durable and ultra comfortable. Rubber Nose-Pads The grippy rubber nose pads are designed to stay put while you sweat while maximizing comfort. Shred on. Helio Lenses Polarized polycarbonate lenses with varying visual light transmission (VLT) filters sunlight to enable superior optical clarity no matter the conditions of the adventures you embark on. Go dark if you're spending time in high glare environments near snow or water. Go lighter if you're dealing with cloudy days or low light such as under trees. Red Dot Design Award Award winning design makes these shades perfect for any summit you climb or waters you explore