These pet carriers really allow you to take small animals with you wherever you want in total comfort and safety. Comfort is guaranteed by the highest quality materials used, such as waterproof fabric and mesh windows. It can be carried as a backpack, as a shoulder bag or by hand. It is equipped with a safety leash and is "airline approved". With the right accessories you can even take it on a bike and motorbike. The USB Plus model differs from the USB model as well as from the colors also from the very comfortable bag holder.