Lump Support: Provides clinical-grade traction and stress reduction therapy to help lift your upper body, reduce weight on your lower back, and allow muscles to relax. Helps relieve tense nerve pressure. ^ Back Pain Relief: Through traction, the burden around the ligaments is relieved, and the damaged lumbar annulus fibrosus is brought a good rest. Stretching relieves tight muscles in the lower back and relieves pain from disc degeneration, lumbar hyperglycemia, prolonged driving or sitting, scoliosis, and anesthesiologists. ^ Enjoy Anytime, Anywhere: The Modified Posture Belt can be used during activities, or during rest and relaxation, such as walking, sitting, lying down, gardening, golfing, working, driving, etc.^ One Size Fits 29-49 Waist: Includes an extended waist belt for personal use to support waist sizes up to 49". ^ Attention, this product contains air pump, yellow and silver, the color of the air pump will be sent randomly, please do not shoot if you mind, thank you. Shipping list: 1pcs*pump*belt*instruction book