High quality polyester material,durable and waterproof. Enjoy the spaciousness of expandable pockets in which you can store dog food, water, snacks, wast disposal bags, etc. Adjustable. You can adjust the dimension according to your dog's size, secure everything in place. Comfortable and breathable. Adjustable straps for maximum comfort & fit,breathable mesh harness could let your dog feel good. Multi-functional dog backpack, ideal for dog hiking, camping, long trail walks, backpacking trips, traveling or everyday use.