3 Ring No Pull Style Design - Helps eliminate harmful choking and prevents tension during walking. This also provides the owner with 3 different traction leash connection points, allowing you to find the most suitable choice for yourself and your puppy Breathable & Padded Vest Design The inner lining of our no pull harness for dogs is designed with lightweight, moisture-wicking that keeps your pet cooler and is gentler on their coat and skin for more intense outdoor adventures. Easy To Use - With a single buckle, this no-pull harness easily goes on and off in seconds! We call it easy on, easy off, Perfect choice for everyday walking, running, training, hiking or wherever your day and active lifestyle takes you! Flexible Adjustable - Both chest and abdominal straps can be fully adjusted, making it perfect for small, medium, and large dogs. Our harness are also equipped with a full set of night safety equipment, such as reflective chest straps and reflective trim lining, outlining the contours of our harness to help ensure the safety of your dog at any time, day or night Find Your Pet Dog Optimal Size - Dog vest harness include the sizes from XS-XXL for Small Medium Large breed. Multi colors provide more choices. Please choose size based on your dog's chest and neck girth by measuring around the widest part of your dog's chest and neck before purchase (If between sizes, choose the larger size and be sure to set aside 1 inch)