Tread is a unisex sunglass style that is lightweight and equipped with large temple grips that make it a great choice for men and women with active, outdoors sports oriented lifestyles. The polycarbonate frame is rugged & durable and features hypoallergenic temple grips and adjustable nosepads to ensure a no-slip, comfortable fit. Color choices are crystal burgundy frame with brown lenses, crystal dark brown with brown lenses and black with grey lenses. Tread ‘s polycarbonate lenses have an anti-scratch coating and are highly shatter resistant as well as 100% UV A/B/C rated for ultraviolet ray protection, which ranks them amongst the best sunglass lenses for sunglasses at this price point. Tread has a medium-large frame size.