Please do not worry of the material
A. Adjustable velcro closures,which can provide the most suitable size to you pets.
B. Safety material.Cover Outer is made of environmental TPU, which is colorful printed and super waterproof. Middle is soft elastic film, which is soft and comfortable for your dogs. Inner is polyester mesh.
C.Simple but good design.Which is very confortable for your pets, no matter what they do, such as running, sleeping and so on.