Large, reuseable hot/cold gel packs. These Rapid Relief® Cold/Hot Gel Compresses with Form-Fit Gel are designed to provide comforting cold or hot therapy in an effective reusable system. It's like getting two products for the price of one! They remain flexible even when frozen, and can be microwaved for fast heating. Easy, moldable cold or hot therapy almost instantly. Latex free, non-toxic. Dimensions of Gel Packs: 5" x 9" (13cm x 23cm)