1.U-shape Pack designed 2.Offering relief to the back, sides of neck and the shoulders. CE, MSDS, FDA Certified. feature U-shape is designed to give relief to the back, sides of neck and the shouldersHot compress relieves arthritis, rheumatism, cervical diseases, stress, muscle spasms, soreness and pinched nerves.Cold compress reduces swelling, inflammation, aches and stimulates blood ...