A comfortable solution to the age old problem of back pain, and the top choice of medical professionals for over 20 years! The limestone-based neoprene offers four-way stretch for full mobility while retaining body heat to provide soothing moist heat therapy, keeping muscles loose. Fully adjustable, it's great for relieving tight or sore backs due to heavy lifting, sitting or riding for long periods of time. 30-Day money-back guarantee.