Gocheer Adult Swimming mask, Snorkel Mask Full Face with Adjustable Head Straps Foldable Underwater Breathing Device Anti-Leak Anti-Fog Dry Top Set Seems to be very high quality rubber, feels like silicone. This particular design has a detachable snorkel and the price was great. The seal around your face is good so water does not get in. Overall it's a great buy I would highly recommend it.