Material: constructed from soft, absorbent terry cloth, the cover provides a comfortable layer between the hot pack and the skin. this fabric is known for its durability and ability to retain heat, enhancing the effectiveness of the therapy. fit: designed specifically for use with chattanooga hydrocollator hotpacs, the cover fits snugly around the hot pack, ensuring proper coverage and maintaining the hot pack's placement during use. washable: the cover is machine washable, allowing for easy cleaning and maintenance. this helps in keeping the cover hygienic and in good condition for frequent use. design: the cover typically includes a secure closure, such as a hook-and-loop fastener, to keep it in place on the hot pack and prevent slippage during treatment.