Origin: Mainland China Effect: Bone Care Item Type: Braces Supports Model Number: Back Lumbar Support Belt Number of Pieces: One Unit Material: Composite Material Application: Back Features: Relieve lower back pain. The back brace contains 4 memory-aluminum stays that are quadruple harder than commonly used PP strips and 2 steel springs placed along the waist sides, offering 360-degree stronger vertical support to the lower back, helping prevent excessive muscle movement and reduce pressure on discs. Wear comfortably under clothes. The back support is made of 4-way stretch elastic material with 3D knitting technology and varying compression levels for superior fit, breathability, and comfort. The inner layer is made of velvet fabric, providing a soft, smooth touch suitable for wearing under clothing. Support during physical activities. The back support features 2 elastic straps designed to provide additional compression around the lower back to help prevent strain during lifting, prolonged standing or sitting, housework, or work-related tasks. May help relieve discomfort associated with waist muscle strain. Thoughtful design details. Two silicone anti-skid bands are located on both sides of the waist to help prevent the support belt from rolling up during sitting, bending, or movement. The wide hook and loop fastener on the elastic straps provides strong, secure closure. Made with PVC material known for softness, it is designed not to scratch skin or damage clothing. Durable construction. The waist support features double-ed seams for enhanced durability. Quality is strictly controlled to ensure long-lasting use. Size: Measure waist at the level of your navel. S: Fits waist 60–75 cm (23.6–29.5 in) M: Fits waist 75–85 cm (29.5–33.5 in) L: Fits waist 95–115 cm (37.4–45.3 in) XL: Fits waist 115–125 cm (45.3–49.2 in) XXL: Fits waist 125–140 cm (49.2–55.1 in)