High altitude training mask for ultimate respiratory training, Maximize performance in running, mixed martial arts, yoga, soccer, basketball, swimming, football and hockey, Conditions your lungs by pulmonary resistance and strengthens the diaphragm, Increase surface area and elasticity in alveoli, lung capacity and anaerobic thresholds, Levels of Intensity: 3 nose pieces for 3 levels of intensity: 1 x, 3 x, 6 x and 9 x restricted breathing,Trains your body to breathe in altitude resistances of 3000 ft, 6000 ft, 9000 ft, 12,000 ft, 15,000 ft, 18,000 ft Includes: 6 air resistance caps, 3 base pieces with flux valve plungers, 1 silicone training mask, 1 neoprene sleeve, fitness workout booklet/instructional booklet