This felt cat cave is integrally pressed with high-density eco polyester felt, formaldehyde-free and odorless to protect cats' health. The semi-enclosed cave meets cats' natural hiding instinct and relieves stress. Thick felt provides constant temperature & air permeability, warm for winter and cool for summer, all-season available. Wear & scratch resistant with anti-pilling performance; double wrapped smooth edges prevent paw injury. Zipper split design is fully detachable for thorough cleaning, foldable for space-saving storage.