It was that cold stores and that it also determines considers this a couple of hours, but just as cold stores, it also takes heat (eg from netbook / laptop).
It can be put in the freezer, it is very cool, it is placed under netbook / laptop and once it is hot remains the pad much longer cold.
The first product of the Hama I do not believe.
I have now can cut a 2mm thick aluminum plate (google: aluminum plate - there you will find companies that make something). This is cool and stay cool (netbook remains generally 5 ° C cooler), is easy and costs only 5 more than the pad (incl. Shipping). Advantage over the pad is that the drive to the netbook / laptop always has a flat surface so that you can park it safely on the bed / sofa.
Otherwise:
---------------
Shipping + packaging is too expensive. This part fits into a big envelope but these dealers packing it in a far too large and requires Kartoon 4.99 shipping. Since the part is pointless in my eyes and you have to send it back again anyway you throw one hand, 4.99 out of the window (you do not get refunded) and one carries the return costs themselves (Maxibrief believable 1.45). Nearly 7 waste of money. Saves you the !!!!!!