Specifications:Type:Snorkels.Package Include:1Pc x Snorkels.Features:Five one-way exhaust membrane, can prevent get dead air drainage and eliminate gas caused by anoxia accidentWhen diving, float the club floating plug into the hole, water canand 39;t get into the tube. Shell has a wave function.One-way membrane, prevent the spit out of carbon dioxide gas into the tube strandedBending thread shape, silicone material can be betterFront design, without having to look up to breathe, no water even if tilt, is suitable for snorkeling and swimming training.One-way and drainage design, the bubbles will not affect the line of sight, no any water left.,Wearing the adjustable Angle bracket, convenient adjustment, stable and comfortable.Tapered pipe, reducing resistance"