With the Escalate S. F. H. Sunglasses, you get three running and cycling specific frames through Tifosi Optics' revolutionary interchangeable frame system. By quickly detaching each temple, you can shuffle through Tifosi's sport specific, frameless Shield frame with fixed lenses, classic half frames with two interchangeable lenses, and the casually styled full frames with two additional interchangeable lenses. The nose pad and both temples are adjustable to ensure a personalized fit. Each lens features scratch resistant capability, ventilation slits, and a hydrophilic coating that repels water, oil, and dirt. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer andor birth defects or other reproductive harm.