Swim Goggles & Masks features: Great diving goggle made the experience so much more enjoyable . It has an adjustable strap that makes it easy to get the proper snug fit for snorkeling ,soft & flexible material, comfortable to wear ,and water didn& 39;t leak. This is the perfect snorkel mask for your trip . Features Color: Black Material:Silicone Size: About 15 x 6.4 x 4cm Tempered Glass The goggle featured durable and sturdy glass, impact and pressure resistance Premium Underwater Scuba Goggle – An all-purpose dive mask for divers, snorkeling, spearfishing, or freediving High Clarity – Perfect for pool, ocean, or even lake diving, this frameless diving mask boasts an clear lens to provide clearer views in every temperature Flexible Silicone Face Seal – Designed to fit your face more comfortably, these freediving masks with adjustable head straps help keep water from leaking in Snorkel mask is skirted around face. With breathing tube will reduce the the possibility of fogging for that you don& 39;t have to breathing gas from the mouthNOTICE:Please DO NOT jump into pool face-down wearing this snorkel mask, these are not swimming goggles, the lens bears huge pressure impact from water when you do that, it& 39;s instant pressure equals smashing a piece of glass to the hard ground.