Pure Silicone Skirt and Strap; 2-window design for maximum field of view; EZ adjust buckle technology; High quality polycarbonate frame; ClearVu tempered glass lens; Fits Adult Medium to Large faces; Pure Silicone Flex-Neck and Mouthpiece; Hyperdry Technology reduces water flow into the snorkel; Large capacity drain chamber and purge valve for easy clearing; Ortho-consciously designed mouthpiece for ultimate comfort