Pack can be frozen for cold use or boiled for hot use. Reusable. Large size. Non-toxic. Use for first aid preparedness and safety in health environments, medical environments, offices, warehouses, schools and homes. Width: 8 5/8"; Depth: 8 5/8"; Number of Pieces: 1; For Use With: First Aid Stations and Kits or Individual Use.Note: This is a non-returnable item.