The speedo fastskin3 speedsocket 2 swimming goggles offer smoked polycarbonate lenses ensuring medium protection against the sun and bright light which makes them suitable both for indoor and outdoor swimming to prevent steaming up these lightweight racing goggles have an anti fog coating and protect your eyes by filtering out harmful uva and uvb rays they provide clear undistorted peripheral vision and guarantee a customised fit thanks to a double head strap made from flexible silicone