SLACK was already bold and versatile enough to suit any occasion. SLACK COVER takes these characteristics of light weight and comfort, and adds removable shells on the sides and above the nose to transform your vintage glasses into a veritable summit exploration accessory. Featuring a doublebridge frame with bold styling, they are available in three lens options, including SPECTRON HD Polarized lens, a polarized lens that amplifies detail, enhances contrast and color, and reduces eye strain for uncompromising all-day comfort. SLACK COVER will have you loving the high-altitude environment more than ever before.