1. Made of neoprene, it is an imported product. It can simulate high - altitude training. Using our fitness mask can help improve your lung capacity, enhance endurance, and break through your own limits. 2. You can choose your training intensity. With a 24 - level resistance design, it is suitable for different groups from beginners to professionals, allowing you to customize your training plan. 3. It is comfortable to wear. The universally adaptable cuffs and the ergonomically designed gripping mask ensure that this sports mask does not affect comfort while guaranteeing functionality. 4. It is easy to clean. After each workout, you can use the cleaning spray and cloth we provide to maintain hygiene. 5. It is durable. Our fitness mask is made of ultra - durable ABS plastic and comes with a zippered storage bag for easy storage and carrying.