Description [Size]: S (neck 27-33cm, chest 39-48cm, weight 3-6kg); M (neck 34-38cm, chest 50-64cm, weight 6.5-16kg); L (neck 39-52cm, chest 62-78cm, weight 16-27.5kg); XL (neck 53-74cm, chest 74-94cm, weight 27.5-45kg). [Breathable]: Made with a lightweight and breathable mesh lining to improve comfort and breathability. This dog harness for small dogs is suitable for walks, hikes and runs throughout the year. The wrap-around design helps provide comfortable and secure walking for your dog. Even pressure distribution helps reduce strain. [Simplify Wearing]: This durable pet harness features two quick-release buckles on both sides for easy on and off. Simple two-step process: insert the front legs through the openings, fasten the buckle, and secure. Adjust the two side clips to achieve a snug and secure fit. [Adjustable]: This adjustable harness has four adjustment points around the body. Use the two neck straps and two chest straps to achieve a customized fit with room for growth. Ideal for daily walking, running, hiking, training, and outdoor activities. [Reflective Strip Design]: The dog walking harness includes reflective stitching that enhances visibility in low-light conditions, helping to alert drivers and pedestrians during evening or nighttime walks.