Medline Instant Hot Packs offers convenience with everything you need in one set. Medline Instant Hot Packs are designed to meet your expectations and needs, without being expensive or overly priced. Features activation method of squeeze direct to skin: fold to activate design: holder: length inches: 6, enhancing overall functionality. Features in package type of nonretail reusable or disposable: disposable width inches: 4, enhancing overall functionality.