The Airfoil biker bifocal sunglasses with High Definition Blue Blocking lenses are the perfect motorcycle riding glasses for sunny days, cloudy days and rainy days. Blue Blocking lenses filter out the blue light in the UV spectrum (also known as Blue blocker lenses, High Definition lenses or HD lenses), which causes haziness and glare; leaving a clearer and crisper view. Equipped with rubber nose pieces and ear pieces, they provide super comfortable and sung fit. High profile vented EVA foam cushions offer maximum protection from dust, wind and the harmful UVs. Lenses are ANSI Z87.1, the highest certified safety polycarbonate lenses with anti-glare coating. Fit medium to most of extra large heads. Free microfiber cleaning case is included for each pair!