The FunRun Vario Harness is made with no pressing seams, and is stitched absolutely equal on both sides. Like the standard FunRun, the Vario harness is cut is long so that it does not cause chafing at the elbows. However, the Vario is unique, as it is an adjustable harness. This is ideal for growing dogs or dogs with thick fur that may be occasionally clipped. The adjustments for the Vario include the neck opening, the top length, and the girth. Please see the sizing guide on the FAQ page to ensure that you order the correct size. If you have any questions, please do not hesitate to contact us.