Tifosi Stelvio Multi-Lens Eyewear - Performance Exclusive nylon frame Polycarbonate lens Grilamid TR-90 frame is made from homopolyamide nylon and features an extremely high alternative bending strength, low density and high resistance to chemical and UV damage Polycarbonate decentered lenses flex instead of shattering upon impact and eliminate visual distortion and magnification for exceptional optical clarity Glare Guard lens coating reduces glare and decreases eye fatigue while allowing the wearer to distinguish terrain breaks Vented lenses increase airflow and decrease fogging Hydrophilic rubber temples and adjustable nose pads increase grip when in contact with sweat, resist aging and UV breakdown, and allow for a customizable, comfortable fit