Features: Breathable mesh material for air circulation. Adjustable for a comfortable fit. Evaporative cooling technology. Durable design. Easy to put on and take off.Specifications: Material: 100% Polyester Mesh Exterior, 80% Rayon & 20% Polyester Interior Season: Summer Sizes: S, M, L, xl, xxl Neck Measurements ( cm): S: 38, M: 56, L: 59, xl: 62, xxl: 69 Chest Measurements ( cm): S: 48-61, M: 56-68, L: 64-78, xl: 70-90, xxl: 76-100 Back Length Measurements ( cm): S: 31, M: 41, L: 45, xl: 50, xxl: 56 Neck Measurements ( Inches): S: 15.0, M: 22.0, L: 23.2, xl: 24.4, xxl: 27.2 Chest Measurements ( Inches): S: 18.9-24.0, M: 22.0-26.8, L: 25.2-30.7, xl: 27.6-35.4, xxl: 29.9-39.4 Back Length Measurements ( Inches): S: 12.2, M: 16.1, L: 17.7, xl: 19.7, xxl: 22.0Package Includes: 1 x Dog Cooling Vest Durable Breathable Reflective