Size M is suitable for dogs with chest scale 54-68cm/21-27in. See our size guide in photos and measure your dog accordingly. Durable stain and water-repellent materials with soft breathable padding for comfortable daily use. High quality Duraflex buckles and lightweight aluminum hardware. Hand wash in warm water with mild detergent / Machine wash 30ºC (use laundry bag). Two leash attachment options - one on the dog's back for everyday walks and one on the dog’s chest for training purposes. Stay visible when it’s dark outside with the efficient 3M reflective trim for enhanced visibility in low-light conditions. Separate attachment point for your dog’s ID tag. An easy-to-use aluminum fitting allows you to open/close the neck strap - convenient for dogs that prefer not to have a harness pulled over the head. Four points of adjustment ensures optimal fit for each individual dog. The new version 3.0 Comfort Walk Air harness from DOG Copenhagen is a lightweight and robust everyday harness that’s easy to fit and put on and comfortable for the dog to wear during any level of exercise. The ergonomic design is gentle on the dog’s back and neck areas.