Lens The OTG lens is Lexan for a superior vision quality that will provide you with an excellent level of detail so that you see every inch of the path ahead. The lens comes with a, specially designed, raised section at the top of the lens to improve the overall peripheral view from the goggles. Strap The strap has been specially designed to be extra-long so that it can fully adjust and fit over any helmet type. The strap is also especially wide at 4. 5cm thick and made of silicone so that it creates a stretchy and more secure fit so that the goggles stay in position even when you are at your most active. Read more… Frame The goggles frame comes with a triple layer of foam to provide an extra level of comfort and shock absorption. The foam has also been specially engineered with moisture managing technology so that the goggles will stay in place even when you are sweaty of in rainy or moist conditions.