This black Hot/Cold back pad is essential for heavy lifters at work or the gym, bent-over labor, office chair or driver back pain, fibromyalgia, cramps, and more. It's even great for long road trips or airplane rides. The soft edges and snug elastic fit design on the wrap-around pad make it uber comfortable to wear and one size fits most at approximately 39.3" long Perfect for any gender. The removable gel pad can be heated up as instructed or cooled down in the fridge or freezer. The back pad comes packaged in a box.