Comfortable, headband is made of soft and elastic silicon, Adjustable headband ,Easy quick release design.Mirrored lens can filter scattered light of natural light and give you a soft clear vision to promot your swimming.Anti Fog treatment to enhance clearer vision;Note for anti-fog:using baby shapoo to wash the goggles can prevent fogging,Huge frame make your wearing more comfortable.Spectacles frame: 100% silicone material, soft and comfortable to wear, heightening widening circle mirror helps reduce eye pressure, twin lens ring wear simple, streamlined appearance design, effectively reduce the water resistance ,so that pleasantswim.Soft frame construction with integrated hypoallergenic seals;Note for new to wear the mask:need to press the goggles to you face in order to remove air and goggles can suck face to leakproof.