Features: Cost-effective, no need to afford a massage every week or every month, this mat helps by stimulating blood flow to those contracted areas, making you much stronger and healthier. Large enough to fit your full back, with a pillow and a ball, which is great for pain relief as it\'s applied to a specific slightly depressed point on the body. Made of fine cotton, sponge and plastic, it\'s excellent for users who sit before computer for all day long as well as active individuals and athletes. You can get instant back and neck pain relief with our product, keeping in use for 20 minutes per day, you will get a better result. It can not only relieve back, neck, shoulder and sciatic pain whether mild or chronic but also relieves headaches. Easy to keep it clean because it\'s detachable, you can wash it with clean water after using for several times. A little painful at first then warm then pain goes away, which can help you have a good sleep after use.