Koolpak Hot and Cold Gel Packs Reusable - 12Cm X 29Cm Microwaveable Heat Pack...
£15.99
For warmth - Heat in microwave for 30s then further bursts of 10s as required. Do not overheat. For cold - place in freezer for 2 hours. For heat - microwave for 30 seconds, then another 10 seconds as needed.
