The Tifosi Elder SL Single Lens Sunglasses were popular as an interchangeable model but Tifosi have changed this larger-lensed style into single lens model. A great option for mountain biking and for those with larger faces. Virtually indestructible Grilamid TR-90 nylon frames keep the Elder SL lightweight, with deep full-coverage lenses protecting your eyes from harmful UVA/UVB rays. Vented lenses decrease fogging and the fully adjustable, slip resistant hydrophilic rubber arms and nose pieces ensure a custom fit. The Crystal Smoke ( translucent grey ) Elder SL comes equipped with a Smoke lens, a zipped hardshell case and a microfibre cleaning pouch. Tifosi Elder SL Single Lens Sunglasses Features Hydrophilic rubber ear and nose pieces for a no-slip fit Adjustable nose and arm pieces Vented lenses increase air circulation & reduce fogging Fits M-XL face sizes 32 grams 100% protection from harmful UVA/UVB rays Lifetime Warranty against manufacturer defects