YUYU is essential in helping to ease muscle pains and allowing me to move more comfortably. I originally bought this product thinking it would simply be a longer version of a standard hot water bottle. I liked the idea of it being able to cover more of my body and the fact that I could use it hands free. In reality, it's so much more than just that! Having recently been diagnosed with Chronic Fatigue Syndrome, there are times when I find it really tough lugging a heavy, aching body around. On my worst days my YUYU is essential in helping to ease muscle pains and allowing me to move more comfortably. On better days, I find I use it more for self-soothing... wrapping it around me feels like I'm getting a much needed hug! I instantly loved my YUYU and won't be turning back (sorry, old bottle!)