Using this vital capacity running training mask will improve your strength, strength, and endurance training.You can constantly train and adjust your resistance levels without having to remove the mask.
Multi-function fitness training mask :Suitable for most sports activities you might like.Running,cross-fit, jogging, gym, cycling, tennis, basketball, rugby, skiing, hiking, marathon ext.
Made of environment-friendly, stable silicone material.Easy to use and clean: We have moisture wicking technology to prevent it from slipping with our front and extra built-in handles.
Durable and reliable exercise masks that focus on every little detail.One size design,for most of Adult.Increases and conditions lung capacity by creating pulmonary resistance
Good air tightness?help to improve your breath-ability.24 breathing resistance levels design to accommodate all performance levels – simulating altitudes of 2,000 to 18,000 feet,fits most men and women