Sporn Pet - No Pull Mesh Harness Med Black. Dog: Harnesses The Sporn Non-Pulling Mesh Harness offers total control, style and comfort for any dog. The patented system "gives" with your dogs natural movements and is designed to humanely deter pulling. The flexible mesh materials and thick, padded sherpa sleeves provide maximum comfort. All materials are made from the highest quality nylon and nickel-plated hardware to reduce weathering. Black Medium