Body Glove Oasis Mask and Snorkel Combo, Blue Mask 2 Widow Design Low Volume Mask Pivot Buckle for Custom Fit Easy Adjust Strap Clip For Easy to Adjust and Lock the Strap Tempered Glass Lenses Meets All ANSI Standards Rubber Facial Skirt and Strap Provides a Soft and Comfortable Fit Double Feathered Edge Soft Rubber Skirt Snorkel: Purge Valve for Easy Clearing of Water from the Snorkel Submersible Dry to Prevent Water Entering Into the Tube Pre Bent Flex Section Reduces Jaw Fatigue Great for Snorkeling or Scuba Replaceable Mouthpiece Patterned Silicone Mouthpiece Design for Extra Comfort