Sport Fitness Mask for Heart Lung Oxygen Control Altitude Training, Unisex

Your browser does not support our video. FREE SHIPPING! Material: Nylon, food grade silicone SIZING: HEAD CIRCUMFERENCES Small 17.3-18.9 in, <143lbs 44-48 cm, <65 Kg Medium 19.3-20.0 in, 143-220 lbs 49-51cm, 65-100 Kg Large 20.5-22.0 in, >220 lbs 52-56cm, >100 Kg Raise your performance to the next level! This high-quality, altitude simulation mask works to enhance endurance in athletes who wish to elevate their overall physical fitness. This groundbreaking Altitude Fitness Sport Mask is a great tool to provide resistance and simulate the effects of high altitude to benefit non-pro and pro athletes alike. Function: Gym Oxygen Control Fitness Training Mask has a 6-setting Toggle Switch to simulates different altitudes from 500 Meters to 6000 Meters. Specific settings are 500M, 1000M, 2000M, 3000M, 5000M, and 6000M. Mask is equipped with Carbon filter and is dustproof, windproof, anti-virus, and anti-smog. Applies to Cycling, Running, Hiking, and enduran