Heat pack design has really pushed forwards over the last decade. The Hydra heat pack from Normedical could be seen as having the most up to date, optimal design in heat pack technology. The heat pack has a solid, robust structure, making it almost indestructible whilst still flexible enough to conform to the contours of any specific area of the body. The pack is also durable in respect to being completely bacteria resistant and highly resistant to developing molds. The heat pack is available in a wide range of sizes (see below) to cater for your own individual requirements. Should the pack become dirty it can be easily cleaned with a soft wipe. If you are still using an older version of a heat pack, now is the time to make the upgrade. Size Dimensions Small 10 x 6 Universal 19 x 5 Standard 17 x 11 Cervical 17 x 11 Oversize 17 x 13