Get the relief you need with the FitRx Recovery Heat Heating Pad! This personal heat pad can heat up to 143.6F in seconds, making it ideal for quickly relieving cramps and muscle pains. Select your preferred heat level on the in-line controller, then place the large heating pad on ...Get the relief you need with the FitRx Recovery Heat Heating Pad! This personal heat pad can heat up to 143.6F in seconds, making it ideal for quickly relieving cramps and muscle pains. Select your preferred heat level on the in-line controller, then place the large heating pad on your body and relax.