Unfortunately, our short three month colic. If he has to bear on the belly, is a matter of minutes or less rest, which lasted more than an hour earlier. The shell (ie the actual Bear) is super beautifully finished. As inlay can then use other small Kirschkernkissen. The enclosed part keeps out (contrary to instructions) loose 1.5 minutes at 1000 watts and is then relaxed and warm thanks to the shell for more than one hour. Super purchase and the price is also top!