Specifically Designed - For The Back: The lower back pack is designed to fit comfortably around the lower back and stomach with straps to hold it in place. A long strap and large pad allow bigger areas to be treated giving more pain relief. The adjustable strap makes the heat pack suitable for waist sizes between 28"(72CM) and 61"(156CM) which is suitable for most body types. Genuinely Relieves Discomfort: The ingredient we used is flaxseed. millet. and clay beads which are all-natural and retain heat & stay warmer for longer. Hot and moist therapy is good for stiffness. sore muscle. inflammation. lower back pain. as well as menstrual cramps & stomach discomfort. The heated backwrap is an eco-friendly and natural painkiller used to relieve pain with its deep heat. Reusable Hot Pack: The heated back bag is made of super soft fabric which is comfortable and skin-friendly. It is reusable. highly durable. safe. can be used on a long-term basis which is good for the environment. Simply heat it in the microwave and apply it to your back for a fit so comfortable. youll barely notice wearing it. Easily Used: Since the microwave is convenient to use. you can use it while sitting on the couch. lying in bed. working at your desk. in the car. use it whenever and wherever you need weighted comfort.