A Therapy Pack is a natural form of pain relief that uses temperature to provide comfort. They can be used hot or cold depending on the individuals preference. Therapy Pack: Extra Large (10"x20") A great size for: Preferred size for adults. Soothing large areas (Across your shoulders, down your back, shins, across your pelvis etc.) Anxiety management Pregnancy & Postpartum care Filled with Canadian Wheat. *This size includes a matching removable & washable cover.