Specifications Material: Wool Felt Function: Cat Play Range of Use: Suitable for cats of all sizes Size Small Size: 50*20cm, suitable for pets up to 3.6kg. Large Size: 52*22cm, suitable for pets up to 4kg. Features 🔄Dual-Use Design: Easily converts from a single tunnel to two separate nests for interactive play. 🧹Zipper Design: Quick disassembly for effortless cleaning and maintenance. 🛡️Premium Material: Made from selected felt, ensuring durability, scratch-resistance, and easy maintenance. 🏗️Stable Structure: Double-layer composite structure prevents collapsing even during active play sessions.