Free combination modeling, multi-level design, solve the cat's natural habit of climbing The cat shelves is made of pine wood and sisal hemp rope. It is durable and helps the cat sharpen its claws The cut of the board is smooth, flat, burr free, safe and comfortable 23.62 inch long bridge, enough for cats to jump and play on the wall The cat hammock bed is equipped with a breathable cotton pad for easy disassembly and cleaning