... ,Toxic Free Dry/Wet (Semi-wet) Design Diving Mask With Snorkelling ,Frontal Best Snorkel 100% Silicone Mouthpiece,PVC Tube ,all use imported ... with a soft press it can be split from the mask . easy for cleaning,buckling ,placing. Semi-dry design stops ... drainage ,delicate workmanship is eligible for overseas sales .Snorkel common sense and instruction :Snorkel : bite the mouthpiece to fit the teeth ...