Magnetic fields help reduce insomnia and fatigue, neck and shoulder pain while stimulating circulation and oxygenation which can often relieve headaches and migraines as well as address arthritic aches & pains. Medical Magnets are embedded in a foam liner between the core and quilted surface. The pillow incorporates a slickened polyester core with a luxurious soft quilted poly/cotton covering. Wash & dry gentle cycles or spot-clean. Fits Standard Size Pillows.