We’ve partnered with Sunski to bring you a pair of Cotopaxi-inspired sunglasses. Meet Treeline: Designed for adventures at sea level and high altitudes alike, this unisex, medium-large frame is a must-have for mountain pursuits, water sports, and worldwide travels. A premier performance style, the Treeline mixes a classic aviator with the iconic glacier goggle. Removable magnetic sun shields protect the eyes from side glare, while perforations prevent fogging and enhance peripheral vision. This Sunski favorite isn’t just great for snow days! Extra dark lenses and sun shields make these a top pick if you spend extended amounts of time in the snow or on the water.The Treeline is a medium-large sized frame ideal for high glare conditions. All Treeline lenses are polarized, block 100% UVA/UVB/UV400 wavelengths and pass the FDA basic impact test.