Shoulder Positioning Support System 200 pounds and up Recommended by physical therapists, chiropractors and surgeons. Great for relieving pressure due to shoulder injuries, surgeries, arthritis, etc. Shoulder Positioning System is NOT a pillow. It is a sleeping device designed for you to use your own pillow for maximum comfort.Must be slept on for 6 to 15 nights to become broken in. Memory Foam Base and coolant material for the cover. Order your shoulder relief support system now and get relief for a better night sleep