Suitable for basketball, football, volleyball, dance, yoga and so on;It can be used to relieve low back pain, but not as a treatment. Elastic fabric with adjustable Velcro, suitable for waist waist circumference under 29 inches; Children size, please measure to ensure fit. The soft neoprene fabric is durable and comfortable.The air hole design makes it ventilated and breathable. Correct the child's bad sitting posture to avoid a hunchback; It can also be used as Waist Trimmer, or abdominal hernias belt. Provides compression to support kids’ lower back and abdominal muscles; Protect your kids’ waist from hurt, Improve your exercise performance.