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The Training Mask 2.0 is a resistance training mask designed for fitness enthusiasts looking to enhance their training sessions, especially in high altitude environments. With a small size suitable for individuals weighing between 90-149 lbs, this mask provides a challenging resistance to help improve cardiovascular fitness and muscle strength. The brand, Training Mask, is known for its quality products in the world of athletic training equipment, making this mask a reliable choice for athletes and individuals looking to enhance their performance.