The replacement core is the "Hottie Thermal Pack". This is the patented part of your Hottie or backwrap. It is suitable for Hotties, Microhotties, Backwraps & Comfort Cushions. The "Hottie Thermal Pack" consists of a fixed weight of water absorbed on to a special grade of material, inside a multilayer plastic laminate pouch. This fixed weight of water, with no gels, waxes or wheat means the heat up times for a particular power of microwave oven can be mathematically calculated. These times are printed on the specially engineered plastic pouch, but please consult your full instruction and safety leaflet when using your Hottie or Back Wrap. Use with our made to measure outer covers: Hotties, micro-hotties and backwraps or buy to use with your own hot water bottle cover: Size 23cm by 19cm. All our products come complete with a Hottie Themal Pack included for instant relief from back pain, joint aches, period pain, muscle sprains and arthritis. CE Registered as a Class 1 medical device for heat therapy. DIRECTIONS Microwave for 2-3 mins, stays warm for hours SAFETY WARNING Follow Safety Leaflet Instructions BOX CONTAINS Hotties Replacement Core Thermal Pack, instruction leaflet See more

No Wheat, No Gel, No Odour. 23cm x 19cm. Microwaveable and Reusable. Suitable for Hotties Micros, Backwraps, Footwarmer, Cushion. Replacement Hotties Thermal Pack Core.