The Tifosi Tyrant 2.0 Sunglasses have a frame which is made from Grilamid TR90, a homopolyamide nylon which is flexible and durable and features a hydrophilic rubber on the arms and nose pads providing you with a custom and more comfortable fit, as the nose and ear pads are easily adjustable in order to limit slippage; the hydrophilic rubber used on these Tifosi cycling sunglasses increase their grip the more you sweat for a precise and none-slip fit. To prevent your sunglasses fogging up and to improve your ventilation and circulation the Tifosi Tyrant 2.0 Sunglasses use vented lenses to try and help keep you cool when you're pedalling hard on your ride. Tifosi Tyrant 2.0 Sunglasses Features TR-90 frame is virtually indestructible, incredibly light and durable 3 interchangeable lens: Smoke, AC Red and Clear Hydrophilic rubber ear and nose pads increase their grip the more you sweat resulting in no slipping Adjustable nose pads for custom fit, limited slippage and increased comfort Adjustable ear pads for custom fit, limited slippage and increased comfort Polycarbonate lenses are scratch resistant and shatter-proof Provides 100% protection from harmful UVA and UVB rays Sunglasses case and cleaning bag included Tifosi's proprietary Glare Guard lens coating reduces eye strain Optically Decentered lenses eliminate distortion and prevent magnification Weight: 24g Fit: Medium, Small Rx Compatibility: Direct Fit Lifetime Warranty