Features: Straighten back by pulling shoulders back to correct slouching, lordosis, winged scapula and so on bad postures. To help relieve pain and soreness of back, neck and shoulder caused by poor posture. Improve and help to fix rounded shoulders, slouching, hunchback and forward head posture for kids, adults, social teenagers and office workers. Unique ergonomic design with semi-rigid fixation of spine, and easy put on and take off. Made of superior neoprene, breathable and skin friendly for comfortable wearing under vest. Fully adjustable waist belt and shoulder straps for proper tightness, and man and women friendly design. Specification: Material: 85% Polyester + 15% synthetic fabric Size: XS / S / M / L / XL / 2XL (optional) Package Weight: 380-420g / 13.4-14.8oz Size chart: Size Suggested waist Suggested height Weight Age XS 60-75cm / 23.6-29.5in 115-130cm / 45.2-51.1in 66-88lb 8-14 S 70-85cm / 27.5-33.4in 130-160cm / 51.1-62.9in 88-110lb 14-18 M 80-95cm / 31.4-37.4in 160-175cm / 62.9-68.8in >110lb >18 L 90-105cm / 35.4-41.3in 175-185cm / 68.8-72.8in >132lb >18 XL 100-115cm/39.3-45.2in 180-190cm / 72.8-74.8in >154lb >18 2XL 110-125cm/43.3-49.2in 180-190cm / 72.8-74.8in >176lb >18 Package List: 1 * Posture Corrector