Zeta discs are an effective alternative to traditional heat and cold packs. They help provide relief from pain, swelling and surface bruising fast. Zeta discs come in two sizes 1 inch small and 1.5 inch large, enabling the user to place a number of small discs around an area such as the knee or the neck or to apply the larger disc to an area such as the shoulder or the back. Discs can be secured using a bandage or medical tape. Zeta technology products are safe for all ages and can be used for traditional hot and cold therapy, far infrared therapy, stress relief, hand strengthening and more. Comfort features feels natural on your skin, reduced risk of burning skin, sleek, thin and light, non restrictive, will not interfere with users flexibility, can be applied anywhere on skin, individually or in multiples for custom configurations, small and can be worn under clothing. Convenience features always ready to use anywhere and anytime, heats and chills in seconds for the best contrast therapy ever invented, never needs to be pre heated for far infrared, portable, lightweight and easy to take everywhere, discreet and easy to wear, can be secured with tape, band aid or under support wrap, needs no maintenance, just apply and go about your business.