Security and Comfort: Sturdy buckle and D-ring on the back connected to the strap, aluminum swivel hooks, safe and stable. The design of this dog harness vest distributes belt pressure evenly over the chest and shoulders to prevent choking or neck tension. Breathable and Lightweight: Constructed with honeycomb ventilation mesh design. The material is soft and does not damage the dog's fur. It is more comfortable and breathable in summer, allowing efficient airflow throughout the chest area to keep the dog cool and dry at all times, suitable for walking, jogging, training, etc. Easy to Put On and Adjust: Adjustable harness for dogs and cats in one piece, easy to put on and take off with back buckle and velcro. Velcro can easily adjust the size, allowing for a perfect fit for your cat and puppy. Reflective Design: With a reflective strip design and a 1.5m reflective dog leash, the dog harness is visible in low light conditions, enhancing safety when walking at night. Available sizes: XS: Chest 28-30cm, Neck 22-26cm | S: Chest 35-38cm, Neck 28-32cm | M: Chest 41-44cm, Neck 34-39cm | L: Chest 45-48cm, Neck 35-40cm | XL: Chest 55-59cm, Neck 44-48cm