The ELEVATION Training Mask 2.0 in size Medium is designed for individuals weighing between 150-240 lbs, catering to martial arts, MMA, and boxing training. This high altitude training mask by Training Mask is made in the United States and helps users simulate high altitude conditions to enhance their cardio and endurance during workouts. Perfect for athletes looking to improve their physical fitness and performance, this innovative training equipment is a valuable addition to any sports training regimen.