Our biofuse glasses just got better. Introducing biofuse 2.0. Even with our speedo biofuse technology ® A bestseller, our new glasses take comfort and fit to the next level with a new patent-pending push-button mechanism and super soft seals with a new groove design. It's everything you love about biofuse now even better.features:- still features our speedo biofuse technology ® Best selling for flexible comfort every time you swim. - super soft seals with a new groove design offer the same best-selling fit. - new flexible and strong internal frame design, stretches and conforms for a super snug fit and provides superior stability. - newly designed lens shape, offering excellent peripheral vision. - new patented push button mechanism for quick and secure adjustment - sleek low profile strap with traction gears for a secure and comfortable fit. - an anti-fog spray coating provides clear vision. - maximum uv protection with polycarbonate lenses that have uv400 protection. - clear lens suitable for all environments