These are Competition Racing goggles. Speedo design and engineer goggles within this range for the best swimmers in the world. They are among the most advanced racing goggles, featuring a hydrodynamic low-profile design for the minimum in underwater drag.This comfortable racing goggle has a hypoallergenic silicone seal and head strap, as well as interchangeable nose bridges to help you find the most comfortable fit. The mirrored lens features a mirror coating that has been applied to help reduce brightness and glare, making them suitable for swimming outside as well as in.