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. To ensure the proper fit, please measure your dog's girth using a tape measure. Getting the right size harness is paramount to proper results. 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).