Based on the hydrodynamic shape design, this goggles use the elastic food-grade liquid silicone, which makes the goggles fit most face shapes comfortably and reduce facial resistance. And the silicone skirt makes sure your face fully absorbed with the mask, so you don't have to worry about water leaking. The adjustable buckles on both sides help you keep the diving mask securely in place without slipping. And the unisex design is suitable for both men and women.