This multi-purpose wrap has many uses. It is 11 in x 35 in. and 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 sold separately.