Stand straighter and feel better with the North AmericanTM magnetic posture corrector. Posture corrector features 12 therapeutic magnets designed to increase circulation and naturally relieve aches and pains. Posture support straightens neck and spine and relaxes tense muscles for easier breathing. Breathable design with fully adjustable straps is discreet under clothing. Magnetic posture corrector can comfortably be worn over clothing, too. 45% neoprene/35% polyester/20% cotton. Hand wash; air dry. Specify size: Regular (28"-38"), Large (38"-48") or XL (48"-60"). Those with spine or back problems should consult a physician.