This product, the K9 Tactical Military Vest Pet German Shepherd Golden Retriever Tactical Training Dog Harness and Leash Set, is suitable for all breeds and life stages of dogs. The harness, made of high-quality nylon, features a durable buckle closure and is available in solid colors. It also includes several features such as breakaway capability, padding for comfort, personalization options, and a quick release function. This product is designed for year-round use and is manufactured in Mainland China with no high-concern chemicals. As an industry expert, we highly recommend this harness for its practicality and efficiency.