A super durable version of the classic PB Elite Trainer.  Walsh use a much stronger upper fabric to help resist against wear from scree, bracken and under growth.  Built on the same narrow last and with the same levels of cushioning as the standard elite trainer, the upper provides slightly more support when contouring etc.  A good choice if you are hard on your shoes and want something that will last a bit longer.  A bit heavy to be an out and out racer but still light enough for most not to notice!  Size up small as do most walshes so maybe go up half a size on standard foot size if you haven't had them before.