The Futura Biofuse Flexiseal Mirror goggle offers the ultimate in Speedo goggle comfort.The Futura Biofuse Flexiseal Mirror goggle offers the ultimate in Speedo goggle comfort. The new super soft flexible seal offers greater flexibility versus previous Biofuse goggles for an even softer and more cushioned fit around the eye. Designed using super soft, gel-like materials and featuring Speedo Biofuse® technology, this goggle makes your comfort top priority. The mirror lenses reduce brightness and glare.