The One swimming goggles have been developed based on extensive research to fit different face shapes. The most important thing in the design of swimming goggles is fit in the eye area. The One goggles have wide TPR seals that fit the face better than usual seals. Wide-angle polycarbonate lenses achieve the best possible underwater view. The mirror lenses have an anti-fog coating and UV protection. The glasses are also great for open-water swimming. The two-piece head strap made of silicone keeps the glasses firmly on the face even in waves. On the strap, quick adjustment on both sides of the glasses.