Fully adjustable: Both the chest and abdominal straps areadjustable, making it perfect for small, medium, and large dogs. Our harness also comes with reflective strips and lined with reflective trim to ensure safety at night, highlighting the design of the harness. It keeps your pet safe anytime, day or night. • Easy to use: Our harness can be opened and closed in just 3 seconds, making it ideal for daily walks, runs, training, hiking, or any active lifestyle!