2 PULLABLE STRONG RAILSWith 2 peelable rails, our straightener can provide strong support of stability to improve bad posture and achieve clearly more upright posture of back and shoulders in a short time. At the same time, it also relieves neck, shoulder, back and headache pains through correct posture. EFFECTIVE COMFORTABLE According to the test, more than 1000 users use posture corrector regularly, they achieve a more upright posture than before within 3 weeks. And our posture trainer is made of high quality and breathable neoprene, particularly light and soft. Therefore, it offers a perfect balance of firm hold and enough elasticity to ensure a high level of comfort. EASY TO USE ADJUSTThe straightener is like a backpack, easy to put on and you dont need extra help to wear and remove the back posture brace. The size of the back support is freely adjustable. The design of Velcro with adjustable belts allows you to easily adjust according to your body type and needs. Material: high-quality neoprene (100% latex-free). Size: L Packing: 1 * Posture Correction Belt