Adjustable Outdoor Expiratory Exercise Tool Silicone Breathing Trainer Portable Lung Respirator for Sports

Endurance Improvement: Breathing muscle trainer, improve aerobic exercise endurance, and enhance muscle endurance. Increase Lung Capacity: This lung exercise dilator can help you adjust your breathing and increase vital capacity during exercise. Improve Physical Function: This breathing trainer can help improve shortness of breath and palpitations, and improve physical function. Adjustable Resistance: This lung capacity training device can adjust the resistance according to the needs, and it is easy to use. Portable: This breathing training device is easy to carry, compact, lightweight, easy to clean, and no burden for sports. Description: Type: Lung Exerciser Expander Device. Material: Silicone+ABS. Color: Black, White. Size: 5 103cm. Weight: 75g. Applications: Athletes, singers, middle-aged and elderly people, teenagers, yoga, fitness. Features: 1. Endurance Improvement: Breathing muscle trainer, improve aerobic exercise endurance, and enhance muscle endurance. 2. Increase Lung Capac