Offer an effective method of applying cold therapy to localized areas. Place the pack in a chilling unit or freezer. Even below freezing packs remain pliable and soft. The cold pack will maintain its therapeutic temperature level for up to 30 minutes. Chilled packs should be wrapped in a towel before applying to treatment area. It is recommended that the pack use not exceed 20 minutes per session. Packs are made out of durable heavy-duty material. Sizes available are Standard 11” x 14” and Oversized 11” x 21”