TUSAs first frameless scuba diving mask, complete with our innovative technology, panoramic view, and lightweight design. 3D SYNQ - A unique Fitting Ring built into the Mask Skirt providing an ideal fit for all face shapes. Swift Buckle 3D - A new low-profile buckle and mask strap for smooth effortless adjustments. Freedom Technology/Freedom Dry - Enhances comfort and fit by utilizing a revolutionary low friction skirt surface. 3D Mask Strap - TUSAs unique 3D design contours to the shape of your head. Round Edge Skirt - Round edge skirt improves both seal and comfort of the mask. Panoramic View - Mask providing an extra wide field of view.