These Dirty Dog sunglasses are ergonomically designed to be superior in comfort and fit in high performance sporting conditions. Rubber nose pads and temple tips for a non slip sunglass that will stay on when the heat is on. The sunglasses are specially vented eliminating fog and moisture which can cloud your vision. Super light weight TR90 frames with 100% memory add to the performance and comfort of these sunglasses. The frames are extremely durable coupled with shatterproof polycarbonate lenses for the ultimate sporting sunglass.