Cocoons Rimless Clip-Ons feature the same optical quality Polaré lenses found in our patented Cocoons fitover sunglasses. The scratch resistant, optically correct polarized lenses are available in gray or amber tints. All styles feature shallow (3.8 mm) or deep (5.0 mm) SoftGrip TR90 mounting prongs to fit various frame styles, including rimless eyewear and thicker plastic frames. If your eyewear is rimless or has a thin frame, choose the shallow (3.8 mm) prong configuration. For thicker plastic frames, choose the deep (5.0 mm) prong configuration. The precision spring bridge allows you to quickly and easily attach the clips to your existing eyewear, instantly transforming them into polarized sunwear. Polaré lenses effectively filter 100% of damaging UVA and UVB ultra-violet light and eliminate blinding surface glare. All Cocoons Rimless Clip-Ons feature a limited lifetime warranty and include a slim protective case.