It can be gently heated in the microwave or cool in the freezer, and is shaped to mould itself to any part of the body but particularly around the neck, making it easier to target the pain or therapy. A soft, cotton fabric. Approx Length 40cm, Width 10cm The heat pack is a reusable, microwavable hot pack but can also be chilled in the freezer and used as a cold compress. Made by hand by ourselves in Lancashire