The soft silicone seal, which has a long lifespan, offers maximum comfort. It comes with four interchangeable nose bridges for a perfect fit to different face and nose shapes. The double strap is easily adjustable at the back of the head and ensures a secure fit, even during starts and turns in the pool. The goggles are equipped with an anti-fog coating, built-in UV protection with an index of 400, and are PVC-free.