Features Silicon Mask Neoprene Sleeve (solid black) Elastic Head Strap 3 resistance valves with flux valves 6 resistance valve caps (white) Manual and Workout Booklet Enhance your fitness and workout tolerance Improve your breathing power, flexibility, and stamina We recommend taking exact measurements using the method described below to determine the correct mask size for your facial structure: Measure from the centreline of your face at your mouth to at least 1 inch (2.5 cm) past the outside corner of your mouth (you might want to ask a friend to assist you). The outer edge of the Training Mask should sit against your face at 1 to 1.5 inches (2.5 to 3.8 cm) outside the corner of your mouth. Double the measurement you have taken and match to the best fit. Sizing LARGE - if your face measurement is 5 inches (12.7 cm) MEDIUM - if your face measurement is 4.5 inches (11.4 cm) SMALL - if your face measurement is 4 inches (10.2 cm) Below is a general guide based on body weight (facial measurements are more accurate for ensuring correct fit): LARGE - 115kgs to 140kgs; MEDIUM - 70kgs to 115kgs; SMALL - 45kgs to 70kgs
