Petown Dog BackPack Harness Quick Release Carriers (Large) Convenient pockets for carrying food, water, and gear for you and your pet wherever you go This adjustable dog backpack is ideal for dogs weights from 20 to 60 pounds,adjustable saddlebags system for a customized fit. Stylish, Lightweight and Washable,Made of R/S PU/420D PU Balanced assistance handle helps lift dog up and over obstacles when you are outward hounding.Backpack with reflective strip is cool and enhance visibility. M:Chest Size:27.5-32 inches, Stomach Size: 16-21.6 inches, Neck Size:20-23.6 inches Suitable Weight for Pet:39.3-61 pounds, Product Weight: 0.725 pounds S:Chest Size:22.8-25.2 inches, Stomach Size: 13.4-20.1inches, Neck Size:14.2-16.1 inches Suitable Weight for Pet:16.5-39.7 pounds, Product Weight: 0.6 pounds