The M-210QB is designed specifically for freediving and spearfishing enthusiasts requiring an ultra-low volume mask with exceptional field-of-vision. The Panthes offers more than 1.5x the vision when compared to the competition, despite its low profile 2-window design. In addition,the M-210QB features TUSA"s patented Quick-Adjust Buckle System and 3-D Anatomical Strap technologies. The M-210QB Panthes is THE choice when fit, low-volume and superior vision is necessary.