The innovative design of the HEAD Sport full face snorkeling mask allows the wearer to comfortably breathe from both their mouth and nose without the issues associated with a conventional mask and snorkel.  It also keeps your face dry and the 180° viewing lens fog free! The mask features make this a great product for anyone, whether you’re an experienced snorkeler or someone just getting into the sport.
Features:
Available in 2 sizes: Small/Medium and Large/X-Large
No fogging on mask lens as fresh air is constantly being circulated
Allows for breathing through mouth or nose
Face stays dry
Wide panoramic view
Silicone mask skirt insures non-leak seal
Dry top keeps water from coming into snorkel during use
Measure the distance between the bridge at the top of your nose and the bottom of your chin.
Choose size small/medium if it is between 10 cm (3.9 in) and 11.5 cm (4.5 in.)
Choose size Large/X-Large if it is more than 11.5 cm (4.5 in.)