Forme Core Long Sleeve Posture Correcting Shirt, size Large. Pre-owned never worn. Fine for Women also The Core Long Sleeve by Forme® is an FDA-registered powerful posture corrector that improves your alignment and effectively treats neck, back and shoulder pains commonly associated with spinal disorders. This versatile long sleeve features the same patented posture correcting technology and soft, eco-friendly fabric as the best-selling Core Tee. Using muscle memory engagement and proprioception training technology, Forme® keeps your shoulders back and down, opening your diaphragm and training your body to stay in alignment for enhanced performance and easier recovery. Designed by an orthopedic surgeon to help his mother battle poor posture and compressed lungs from cancer, Forme® will transform your whole body alignment, giving you posture that allows you to perform, think, and live at your highest potential.