Description: Used for sitting and back correction of male and female, children, young and adults. Adjustable fit, unisex, natural treatment method for healthy body posture, improve breathing, pull the shoulders back to stand tall & sit up straight. Provide Upper and Lower Back Support, adjustable straps and magic sticker at shoulders and waist make the entire posture corrector take flexibility. Built in 12 magnets helpful to promote blood circulation in the waist back and help you relieve aches and human body fatigue Easy to wear, lightweight and comfortable, just wear it and go to your daily, gym and other sporting activities etc. Specification: Material: Neoprene, nylon,magnet S (Bust): approx.80cm/31.5inch;Suitable for height below 160cm M(Bust):approx.90cm/35.4inch;Suitable for height below 170cm L(Bust):approx.100cm/39.4inch;Suitable for height below 180cm XL(Bust):approx.110cm/43.3inch;Suitable for height below 185cm 2XL(Bust):approx.120cm/47.2inch;Suitable for height below 190cm Package Includes: 1 Piece Back Brace Note: -Please allow 1-3CM differs due to manual measurement. -Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.