The original rear wheel covering is too small to be truly effective. Even just wet pavement is enough to fling dirt and debris onto the swing arm, tail section and more.
Wunderlich has very cleverly lengthened the part and also made it a bit wider. Still unobtrusive, but the shock, tail section, etc. are much better protected from road debris and rain. This also means less effort in cleaning.
Made of solid 4mm ABS plastic.
First class fit and easy installation.