Pet Carriers Important Information Material:Oxford Cloth Package Size: Size: S, Bust: 39cm-47cm/15.35"-18.5", Back Length: 26cm/10.24" (Approx.)Size: M, Bust: 52cm-70cm/20.47"-27.56", Back Length: 31cm/12.2" (Approx.)Size: L, Bust: 60cm-78cm/23.62"-30.71", Back Length: 41cm/16.14" (Approx.)Size: XL, Bust: 66cm-86cm/25.98"-33.86", Back Length: 54cm/21.26" (Approx.) Overview: In fact, the pet backpack is lightweight, soft, wear-resistant and not easy to tear because of the Oxford cloth material. And your pet will feel cooler and more comfortable because it's breathable. This pet backpack is lightweight and portable and can help you easily take your pet outdoors, hiking, camping, out for a walk, etc. You can also take lots of fun photos to keep as a souvenir. It is constructed of oxford cloth material. There are four sizes that you can choose from. It can help you easily carry your pet to the outdoors, biking, hiking, camping and going out for a walk.