Zoggs Predator Next Gen Swimming Goggles No Leaking Anti Fog UV Protection Triathlon Silicone New and improved seals relieve 15% less pressure around the eye for more comfort. New pulley strap system allows for less tension for easier adjustment. Patented injected silicone frame: allows for a lightweight, more durable frame than the leading brands Patented nosebridge: our unique, exclusive, one of kind nose bridge is engineered and built to always retain it's shape and will not spread when the head straps are tightened Best anti fog Treatment in the industry: the anti-fog isn't just on top of the lenses, its part of the materials of the lens, giving the best anti-fog Treatment in the world Double head strap: split head strap wraps around both the top and lower part of the back of the head, offering more security