Features Material: net and cotton, breathable. Color: Gray-yellow. Size Size XS: Back lenth 10 in; Chest circumference: 14.2-17.3 in; Neck circumference: 10.2 in; Item weight: 0.18 lb. Size S: Back lenth 11.4 in; Chest circumference: 15.7-19.7 in; Neck circumference: 11 in; Item weight: 0.2 lb. Size M: Back lenth 13.4 in; Chest circumference: 19.7-24.4 in; Neck circumference: 13.4 in; Item weight: 0.26 lb. Size L: Back lenth 15.4 in; Chest circumference: 22.8-28.3 in; Neck circumference: 15.4 in; Item weight: 0.33 lb. Size XL: Back lenth 17.3 in; Chest circumference: 26.8-32.3 in; Neck circumference: 18.5 in; Item weight: 0.4 lb. Size 2XL: Back lenth 21.3 in; Chest circumference: 29.1-35.4 in; Neck circumference: 21.3 in; Item weight: 0.51 lb. Size 3XL: Back lenth 25.6 in; Chest circumference: 34.6-41.7 in; Neck circumference: 23.6 in; Item weight: 0.66 lb. Precautions 1: The fibers used are safe, non-irritating fibers that are lightweight, breathable and comfortable to wear. 2: The L-code - 3XL code has a tail elastic design, and the big dog can buckle the tail tightly, so that the clothes are more close to the body. 3: If you need a better cooling effect, you can put it in the refrigerator for ten minutes after cleaning the vest. Features details The surface layer is a heatproof two-color net, filled with plain, cotton,cool and refreshing. Reflective strips on the shoulders and back, invisible buckles make this vest more simple and beautiful. Size XS: Back lenth 10 in; Chest circumference: 14.2-17.3 in; Neck circumference: 10.2 in; Item weight: 0.18 lb. Suitable for pets to go for walks, sports, climbing in the summer. This vest has an elasticated abdomen for easy adjustment.