The Sporn Non-Pull Mesh Dog Harness controls dogs from pulling on a leash humanely, without choking, using the patented "Sporn Effect". It is designed for light to moderate pullers and is guaranteed to stop your dog from leash pulling. The patented, elasticized mesh chest design gives with your dog's natural movements, which provides comfort to the dog while offering total control to the handler. It features padded Sherpa sleeves for maximum comfort and to prevent under arm chaffing, and a flexible mesh chest material for breathability. It's easy on and off, one-piece ergonomic design is made of high quality nylon and nickel-plated hardware to reduce weathering. Available in multiple color and size options.Do not leave harness on dog unattended. It is for walking/running purposes only and is not to be used as a tie-out or car harness.