SPARTHOS Workout Mask is useful for all athletic sports like running, marathons, cycling, football, soccer, tennis, basketball, triathlons, weightlifting, athletics, Crossfit, hiking, yoga, strength training, mma, boxing, running, track and field, nfl, paintball, baseball, hockey, tennis, etc. Good mask, because this mask is also a breathing mask. It can also do workout mask and altitude mask. Altitude mask (high altitude mask for training) is the best training and workout mask 2 0. This running face mask can also be called breathing mask for running or running mask breathing training, workout mask breathing training, because exercise mask is good mask for workout. Work out mask can be used as fitness mask. basketball face mask, but cycling mask and cardio mask will be put as a sport mask. High altitude mask. Best sports mask, work out masks for altitude mask training. Great as cycling face mask. Breathing mask for training is a gym mask 3 0. mask one of the breathing masks calls workout breathing mask. Mask for running is one of the last altitude training devices like endurance mask. Buy with confidence!