I got these for my clowder as sort of consolation prizes as I had bought a plug-in, heated cat bed for my elderly guy (& of course it's not liked by any of the furry gang...) & unlike that heated bed, these were a big hit!!! They are thin, but soft, made with that plushy-stuffed animal type fur. They are easy to clean & to keep the "fur" from getting matted, I air dry or "fluff" dry (in dryer, no heat). I believe that the "secret" to it being "self-heating" is that there is a sheet of Mylar (a.k.a. space blankets used by paramedics/ambulance crews) that reflects their body heat sewn inside & NO; it doesn't make any noise. These are kitty tested (from those that are 6 weeks old - up to those who are 16 yrs old) & kitty approved!
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