From Julius-K9 -IDC Perfect for medium-sized dogs, this black, power harness is designed to give your dog a comfortable walk while still retaining control of them while you do. The Julius K9 IDC Power Harness is easy to put on and will keep your dog safe without causing them harm or pain if you need to pull them back from danger, thanks to the skin-friendly materials. The Julius K9 has been recommended by dog trainers, vets and search & rescue experts for the last 10 years. Chest circumference (cm): 49 – 67. Fastening type: heavy-duty.