Hot tuna purge mask mens these hot tuna purge mask feature a number of technical features that make them ideal for water sports activites in the ocean the mask features a high strength tempered glass one piece curve lense for imroved range of vision with a wide view heavy duty frame the double purge valve offers easier water clearance with an adjustable head strap that allows for a comfortable fit that combines with a hyper dry design for precision leak resistance mens snorkling mask