Training Mask 2.0 Altitude Training Mask NWOT! LOOK!

From TrainingMask website: The Training Mask 2.0, a state-of-the-art workout elevate mask for breathing, is a fitness accessory created to improve your workout and maximize your respiratory strength and endurance. Discover the benefits of using training mask for high altitudes to work out and enhance your training regimen today. Key characteristics: 36 Various Resistance Levels That Can Be Customized. The Training Mask 2.0 is a cutting-edge adjustable resistance system that employs adjustable valves to control airflow resistance. By modulating the intake of air, the mask prompts your respiratory system to work harder, stimulating lung development and cardiovascular improvement. Gradually, your body adapts to these controlled challenges, resulting in elevated performance. Measurements: Size Small 90-139lbs Train simulating 3k feet to 18k feet of altitude! Thoroughly inspected prior to listing. No damage, rips, tears, snags or stains.  All hems intact. No fading, spots or visible wear.  Condition is noted in title and/or description as accurately as possible.  Any questions are welcome! Please review photo(s) individually for closeup details of item. **All photos are of actual item and were taken by me (not stock images) unless otherwise noted.** All of my items are stored in a smoke free home, out of direct sunlight and dust.