Meet the Iron Neck Alpha Harness: a fitness tool that helps you strengthen your neck. It comes with a 40″ stainless steel chain and 2 strong metal carabiners. It has 4 side metal D-ring connectors on the sides and 2 doggy ear connectors, so you can train side to side or up and down.
This neck harness is made with flexible, breathable neoprene. You can find out more about it here.