Promate Shamu Frameless Scuba Dive Spearfishing Mask, black; w/box Package includes one-window frameless mask and protective storage box Frameless design reduces weight and provides close and great view. Extremely low volume design. Flexible swiveling, and easy adjustable buckles system makes fit a wider range of faces than traditional frame mask. Mask features 100% silicone skirt with tempered glass lens for safety. About Shipping and Handling Charge including Tax, please check the Shopping Cart during checkout. Free shipping may apply ONLY in some circumstances.