Zoggs 315721-804 Predator Flex L/XL - Swim Goggles Silicone Imported EXTREMELY COMFORTABLE: Super soft silicone is unique to our goggles. Allows for an extremely comfortable and super soft fit around the eyes for a more pleasing swim and won't cause headaches like traditional swim goggles. PATENTED INJECTED SILICONE FLEX FRAME: Flexes at the nosebridge and temple, allowing each eyecup to move independently, Offering a wider range of fit. BEST ANTI FOG TREATMENT IN THE INDUSTRY: Our anti fog is part of the material of the lenses and is made as part of the lenses in the manufacturing process. DOUBLE HEADSTRAP: Split Head strap wraps around both the top and lower part of the back of the head, offering more security so that you don't lose your goggles when swimming.