The kennels are made of pure cotton, acrylic, and velvet. There are three main types of fillers: sponge, cotton, and seven-hole cotton. It is best to choose pure cotton for the kennel fabric, because it is not easy to generate static electricity; secondly, the fleece material is also very warm and comfortable; it is best not to choose acrylic fiber. Although acrylic fiber is cheap, it is easy to contact dog hair and acrylic fiber. tie. The filling is best to choose seven-hole cotton, which keeps warm and easy to dry when wet; secondly, choose pure cotton, which has good warmth retention, but it is not easy to dry when wet; the last choice is sponge, which is soft and has good warmth retention. , The price is also the cheapest.