Selected materials: The exterior features pineapple checkered velvet, while the interior is a cat sleeping bag made of polar fleece. The construction is warm, comfortable, wearresistant and biteresistant, and breathable. Cat Sleeping Bag for Indoor Cats: The semienclosed design protects your pet and makes them feel surrounded by warmth and security for a peaceful sleep. Cave design: The sleeping bag is designed to align with the cat's natural preference for a secure hiding space, providing greater safety for pets. Large pocket design: Large pocket offers convenient access; you can reach in as you want. Use scenarios Indoor lounging and naps: Place the sleeping bag on a sofa, bed, or designated cat corner to give your cat a cozy hideaway for daytime naps. Cold weather and night sleep: The warm interior helps provide extra warmth during chilly days or nights, supporting comfortable rest. Calming space for anxious cats: The semienclosed cave design offers a secure retreat, helping cats feel safer during storms or noisy events.