Product Name:Magic Hot Cold Pack,Pocket Warmer,Magic Warmer,Heart Shape Pocket Heat Pads, Instant Heat Pads, Beauty Products Heat Pad,instant hot pad, hand warmer,heat pad,heat pack, hot pack, magic heat pack, magic warmer,ice pack,instant hot pack, Magic heat pack,reusable hand warmer,cold pad,hot cold pad,Instant Heat Pads, Beauty Products Heat Pad,heating pad,click heat pad, heat click pad, body comfort pad. Size:8.1x7cm Weight:45gs 1.Magic hand warmer is an instant, portable and reusable heating pad. 2.It is manufactured in a variety of shapes and sizes making it ideal for both indoor and outdoor use. 3.They are innovative, multi purpose and simple to use. 4.At the click of a button, the Magic heat pad will reach 57°C (130°F). 5.The pads are safe and non toxic due to the innovative use of the salt based solution, Sod Acetate. 6.On flexing the small metal disc inside the pad a molecular reaction is started causing the solutioto crystallize. 7.Starting this chain reaction causes the entire solution to solidify. 8.During the reaction (from liquid to crystal form) energy is released in the form of heat. 9.Gradually the heat pad will start to cool down, returning to its original, solid state. 10.The time this takes is dependable on the size and model of the heat pad, however the process can be initiated and the pad re-used again and again. After Finishing simply... Boil water in a pot Place a cloth on the bottom of the pot Place the pad on the cloth inside the pot, and continue to boil the water until all the crystals are dissolved, and the pad is completely clear When the pad is completely clear take it out of the water and place it on a cloth to cool down. When the pad cools down, it is ready to be used again Make sure the pad is completely clear as even one tiny crystal left in the liquid will quickly cause the whole pad to resolidify. If crystals start forming while the pad is cooling, repeat steps 1,2 and 3. Note: Colour of the products may vary to the pictures on the website Romantics Memory Hand warmer MHP20 (18X18CM)MHP2(12.5X12.5CM)MHP42(11X11CM)MHP45 (8.1X7CM)MHP36MHP40