SeaCure Custom Fit GUARANTEED FIT Mouth Piece for Scuba Diving and Snorkeling Snorkel Dive Divers Semi-Dry Dry Snorkels Authorized Dealer Full Warranty SeaCure Custom Fit GUARANTEED FIT Mouth Piece for Scuba Diving and Snorkeling 3 STYLES See Description for YOUR Regulator or Snorkels STYLE REMOLDABLE so that if not at first satisfied, or dental work changes the bite, it can be remolded SeaCURE greatly reduces gum abrasion. reduction of muscle effort in the range of 33% to 59% X Type Model with Bite Limiter for better molding & more comfort!