Kumfy cradle radiator beds kumfy cradle cat radiator beds from danish design the kumfy kradle is a radiator bed for cats made from a soft sherpa fleece fabric overlaid with the danish design paw print motif set on a metal hanging frame simply hook the bed over your radiator to provide your cat with a warm and luxurious place to relax the kumfy kradle is available in two sizes to fit standard single or double radiators nbsp