Mysterious Kuddle Kup Cat Bed: Made from 100% recyclable polyester Corrugated packaging used in delivery comes from sustainable wood fiber U.S. patent #5-363-804 and #5-515-811 (additional patents pending) Polyester ultra-soft cat bed acts as an insulator to absorb and hold the heat that cats love Works like a magnet; electrostatically charged to trap dander, flea dirt, hair and dust 2 beds in 1; unfolds into a play tunnel Approximately 17" diameter Kuddle Kup Mysterious charcoal cat bed is 100% non-toxic and non-allergenic