Sport Training Mask - Running Biking Training and Fitness with Breathing Resistance Settings

Tax included.

The mask controls air flow which increases tension on your breathing muscles.
Boost your training performance
The resistance levels are customizable, you can adjust them according to your level.
Resistance levels from beginner to pro. Its multiple resistance levels allow you to work on your breathing muscle strength and techniques.
High quality mask which does not rip off easily and you won't face any holes or breakages. It is durable and lasts longer than some other masks.