Speedo Biofuse Technology features breakthrough biosynthetic materials, a patented push-button mechanism and super-soft gaskets with agroove design that offers the same comfort and fit - but better. Biofuse Technology for flexible comfort every time you swim Super soft gaskets Flexible and strong inner frame stretches and adjusts for a super comfortable fit and excellent stability Manufactured lens shape that provides excellent peripheral vision Patented push button mechanism for quick and secure fitment Stylish low-profile strap with traction gear for a secure and comfortable fit Spray anti-fog coating provides crystal clear vision UV protection with polycarbonate lenses with UV400 protection