1Made of natural straw material, it is safe, cooling and comfortable to lie onto the mat. 2Come with several bells, will produce pleasant sound while pet crawling on the cushion 3There is a hook on the hammock, easy to install into cage and convenient for pet to use. 4Offer you large, small and medium 3 sizes to meet the needs of different sized pets. 5Can be washed, breathable and perfect for small animals to use in Summer and hot weather.