The SENSE-ation is an enhanced front-connection harness. The girth (bottom) strap, made of custom Softouch polyester webbing, provides extra comfort. Short coat dogs especially benefit from the soft and pliable girth strap. A side-positioned buckle prevents irritation, and strap keepers prevent webbing from slipping. Light weight and durable Duraflex hardware and nickel plated, steel and welded O-rings add strength. The 1" wide webbing is better proportioned for big-shouldered, wide-framed dogs. It is also better for high energy, reactive big dogs. X-Small and Mini harnesses are designed to be used with light weight leashes/snaps (7/16" or 3/8" wide). All straps are custom Softouch polyester webbing. Retractable leashes are not recommended.