This Hot/Cold Water Bag is a simple, yet effective tool to relieve sore muscles, soothe minor muscle pain and cramping, and alleviates stress and tension. For someone who carries stress and tension in their head, neck, back, shoulders, arms, elbows, knees, shins, calves and other muscles, relief is now at hand in a convenient package. This is the one pack that is designed to deliver heat or cold therapy to any part of the body quickly. Flexible enough to easily conform to all body curves. For soothing heat, fill the bag with water heated to 108 degrees-113 degreesF. When you need healing cold, fill the bag with cold water and add ice as warranted. To help with neck, shoulder and back care, simply lay on hot water bag. Suffering with menstrual cramps? Simply position the hot water bag on the abdomen area. For bruises on the elbow, wrist, knee and just about anywhere else, fold the cold- water bag around the area. This is a two-pack of small bags sized 11" x 15". Provides deep and quick muscle penetrating temperatures for fast relief. Despite being thin and lightweight, this sturdy bag supports up to 600 lbs. of pressure. These hot/cold packs are hypoallergenic, Latex-free and odor-free. Great for massage therapy, physical therapy, chiropractic care and post-surgical care. Convenient size makes these great for home use, durability makes them ideal for multi-user environments.