XLR8 Equine Redline VersaWrapXLR8 Equine Redline VersaWrap 11 in x 35 in. Works very well behind the withers, across SI, around the neck poll, around stifles, down hamstrings, and under the cinch girth area It also wraps around your lower back perfectly and with available DC input can be used in your truck on those long drives. This product is too large for an internal battery, but comes with a 120v power cord. Solar battery bank and dc input cord sold separately, coming soon!