The Hawkeye wrap around HD BI-FOCAL glasses with impact resistant polycarbonate lenses protect your eyes from harmful UV rays, wind, dust and debris completely. Rubber nose and ear pieces prevent slippage and provide a snug, comfortable fit. Blue Blocking copper lenses sharpen and clarify vision while reducing glare and heightening contrast and depth perception in hazy, overcast, rainy and low-light weather conditions. Gradient lenses are tinted from the top down, providing darker UV 400 protection from overhead sunlight with a lighter tint on the bottom so you can easily read or see your dash, text, watch & GPS while riding. Hawkeye HD bifocals sun readers are also great for golfing, cycling, shooting, fishing, hunting, snow sports, driving, motorcycle riding or just lounging by the pool. Fits Medium to Large Heads.