The TarantuLace is an unlined leather climbing shoe with asymmetric shape for advanced performance. The RN45 shoe shape is great for upper end performance without hurting your toes. The synthetic leather overlay lacing harness adds great support for entry to mid level climbers and the unlined leather is comfortable and soft. The aggressive rubber heel rand lets you stand in micro edges and the FriXion? RS rubber is hard wearing yet sticky for long life. This is great shoe for gym climbers and outdoor climbers that need a one-quiver shoe that does it all.