Material: Imitation Leather, Cotton, Spong, PVC Shoulder Pad, Zinc-alloy Hook The easiest solution to take dogs and cats out; PU leather material and sponge filling inside. Shoulder pad make the backpack comfortable. Very good quality and soft touch; easy to use and clean; different colors and sizes available to choose from. 1. Asian sizes are 1 to 2 sizes smaller than European and American people. Choose the larger size if your size between two sizes. Please allow 2-3cm differences due to manual measurement. 2. Please check the size chart carefully before you buy the item, if you don't know how to choose size, please contact our customer service. 3.As you know, the different computers display colors differently, the color of the actual item may vary slightly from the following images.