My cats have a "hangmat" ; This is something you can hang on a radiator ! Now that the central heating is on , the mat gets so comfortably warm . My Cats Inka and Maya just love it in there ! As a matter of fact , they love it SO much , that they agree to sleep in there TOGETHER !! SOOOOOO cute ! I took a pic of it and will post it as soon as possible . Maya is my 8 months old calico and Inka my 8 weeks old longhaired kitten . OOOooo , I love them so much ...