Frame The frame for the Accuri Goggles are made from urethane which is a material characterised by its flexibility and versatility yet its overall level of strength and durability. The interior of the frame is quilted in a triple layer of foam that has been specially manufactured to deal with moisture to combat sweat and moist environmental conditions. The strap is for the goggles is an oversized and silicone coated to ensure that it can fit over most helmets and ensures a secure fit that will keep the goggles in place for perfect vision. Read more… Lens The lens is held in place by a 9 pin retention system which is the highest performing across the industry. This ensures a secure fit that will keep the lenses safely in place however vigorous your movement.