Pet Care, Toys, Supplies and Products for Animals Design Little Cube Pet Backpack by Planddo Co., Ltd. The patented trapezoidal 20 degree angle and exclusive effortless straps are able to distribute 20 percent of the load, naturally shifting the backpack's center of gravity to the owner's back. These two features address the issues commonly found in traditional pet backpacks, such as the center of gravity leaning outward and excessive shaking. With a stable and comfortable carrying experience, it reduces the pet's anxiety and restlessness.