Bugaboos Tour de France Sunglasses Tremble Black Frame/Brown Lens Shatterproof polycarbonate lenses  a safe choice for active individuals Lenses offer 100% UVA, UVB, UVC protection Brown tint  Great for medium to bright light conditions providing darkened colors with a slight increase in contrast Anti-slip temple tips and nose pads made from hydrophilic rubber which gets tackier when it gets wet so these sunglasses stay put Frames are made of polycarbonate, a high-strength thermoplastic that is known in part for its flexibility which provides both comfort and impact resistance