Introducing Biofuse 2.0. Still featuring the best-selling Speedo Biofuse technology, a new goggle takes comfort and fit to the next level with a brand-new patent-pending push-button mechanism and super-soft seals with a new groove design. Its everything you love about Biofuse. Speedo Biofuse technology for flexible comfort every time you swim Super-soft seals with a new groove design Flexible and strong internal frame design Crafted lens shape, offering excellent peripheral vision Chrome mirror coated lenses for reduced brightness and glare A spray Anti-fog coating provides crystal clear vision UV protection with polycarbonate lenses that feature UV400 protection