Features:Durable with camera mount, easy attached to gopro cameras.Double air-flow channel - inhaling and exhaling separate channels for anti-fogging.Broadside dual sealing design is from imitating human face, made of liquid silicone without skin irritation.180 degree wide viewing with anti-impact safety window for good vision.With a breathing tube with dry top technology, you can breathe freely underwater.Drain value in the mask, to drain away the water by raising up your head when water leaking.Four adjustable elastic fabric headband, easy to wear and suitable for all kinds of head shape.Ideal for diving, swimming, snorkeling and other underwater activities.Specification:Color: Black/blue/green/pinkSize: S/M,L/XL, please check the dimension in pictureS/M size: inner diameter 17*13CM, outer diameter 23*19CML/XL size: inner diameter 19*13CM, outer diameter 23*19CMNote: GoPro & GoPro waterproof case is not included.Package Contents:1 x Diving Mask for Glopro1 x Breathing Tube1 x English User ManualProduct type: Diving Masks