Waterproof and breathable rip stop nylon, with 240 grams of fiberfill and a smooth nylon lining for comfort. Features a reflective strip down the back and on front closure for increased visibility during nighttime walks. Has double hook-and-loop front closure and belly strap to keep coat in place. To ensure a proper fit and maximum comfort we suggest measuring your dog with a flexible tape measure. Start where the neck and the shoulder blades meet. Measure the number of inches from that point, down the back to where the tail begins. Order the size that corresponds to the measured inches.