The SENSE-ible Harness Gently Stops Dogs From Pulling. The SENSE-ible Harness is a front-leash attachment harness - very different from the "sled dog" style of most harnesses on the market. The leash attaches to a ring on the chest, so you can provide more accurate cues to your dog as to the direction that you want to go. It reduces pulling and often enables a smoother, more enjoyable walk for both dog and human. Quality hardware and construction Nylon curved side-release buckle and belt loops. Nickel-plated metal slide adjusters and welded o-rings. For best results, please measure your dog to ensure a proper fit. The Softouch Training method applies horse training concepts to teach dogs not to jump, lunge, forge or pull. It also assists with teaching commands such as: sit, down, wait, come, stand and heel. Dogs learn quickly with their SENSE of touch and natural instincts without stress or injuries. Available in blue, black or red. Measure your dog's girth using a tape measure. Measure around the body (the rib cage) behind the front legs. 17 - 21" Girth = X-Small (12 - 20 lbs), 21.5 - 24" Girth = Small (21 - 33 lbs), 24.5 - 28 " Girth = Medium (34 - 60 lbs), 27 - 33" Girth = Medium/Large in 3/4" Narrow or 1" Wide (40 - 75 lbs), 32.5 - 40" Girth = Large (70 - 130 lbs), 39 - 50" Girth = X-Large (131 - 200 lbs).