Product Size: small, large Color: red, green, blue Material: PU Package content: 1*dog backpack 1. Breathable Mesh Fabric: With mesh on the front and back, the pet carrier is breathable, ventilated and no pungent smell, keeps your pets free 2. Head Out Design: The front hole allows your pet to look outside, so it is not boring in your pet's backpack. 3. Drawstring inside: Inner drawstring with buckle can be tightened to prevent your pet from jumping out or injuring themselves, effectively ensuring the safety of the pet. 4. Adjustable wide strapsAdjustable wide padded straps help reduce your shoulder pressure, while the retractable straps with buckle keep the backpack more stable. 5. Functional Pockets: There are 2 mesh pockets around the dog carrier bag, ideal for storing your small items such as mobile phone, keys, tissues, etc. to get more interactions with your pet.