The Arena Tracks racing goggles can be used for racing and training. The hydrodynamic lenses are low profile to reduce drag, they have an Anti-fog coating and protect against harmful UV rays. If you swim in a brightly-lit pool or there is plenty of sunlight, the smoke tinted lenses will provide optimum visibility and, at the same time, shelter your eyes from the light. The Blue tinted lenses are considered a great all-around lens option, they reduce glare during foggy, misty days and offer good UV filtering. Best for indoor swimming, and low light conditions outdoors. The thin silicone gaskets give added comfort, making the Tracks goggles suitable for long training sessions. Dual silicone strap with RFA adjustment, that gives secure fit. 4 interchangeable nose bridges for perfect customization to different face and nose shapes. These goggles are made with hypoallergenic soft silicone.