Instant Therapy - 4" x 6", Heavyweight, Junior Accu-Therm Cold Packs: Junior - Heavyweight, 4" x 6", Qty. 16 Increase Comfort, Conformability and Effectiveness with Medline's Top-Seller, The Accu-Therm Cold Pack Cold pack activates instantly and offers patients a new level of comfort. A compress holder is required because these cold packs should not be applied directly to the skin. The insulated version has a foam layer to help direct cold therapy to the affected area.