MEDIUM-SIZED INFO: Please measure the size of your dog before placing an order. The neck: 9.8-27.5 inches/ 25-70cm; The thoracic part: 29.5-43.3inches /75-110cm. There are total five parts of this dog saddle bag can be used to adjust the length. CAUTION: Please try to keep balance of the weight on both sides of the dog pack hound when taking your dog outside. As a result, it can make you dog maintain balance while walking. Please note that the load capacity should be 10% of your dog’s weight and the maximum weight should not be exceeded 20%. SAFE TO USE: We add four reflective strips on this backpack for dogs: they are on both sides of the backpack as well as on the back pad. Therefore, your dog will be much safer while walking in the dark. It is way suitable for dog’s training, hiking, camping, excursion, backpack traveling or daily-use. DURABLE MATERIAL: The dog saddle bag is made up of Oxford material, which is splash-proof, wear-resistant and durable. The back pad is adopted by a mesh fabric, so it is softness and air permeability, so these prominent features doesn’t do harm to your dog’s fur. Moreover, the reinforced handle grip enables you to get hold of your dog in case of emergency. TYPE DORSAL DESIGN: This chest-back dog backpack comes with 6 nylon buckles, so it is easy for your dogs to put on and take off. The advantage of this Y-type design is that it won’t strangle your dog’s neck and the strength will be distributed uniformly on the dog. Your dog will feel more comfortable when wearing this saddle bag.