Hook and loop fasteners keep moist heat packs in place.
Moist heat pack cover - terry with foam-fill - standard- 20" x 24" - case of 12. Hydrocollator® Moist Heat Pack Cover, Foam-Filled Terry, Standard, 20" x 24", 12/Case Hydrocollator moist heat pack cover, foam-filled terry, standard, 20" x 24", 12/case to prevent burning, all moist heat packs must be applied with either a hot pack cover or heavy towel completely wrapped around the pack. Covers are machine washable and can be used again and again..