Wunderlich - Mudsling Inner FenderMudSling Inner Mudguard Function and Product Features The MudSling Inner Mudguard provides 220% more surface area than the stock mudguard It is 185% wider as it extends around the sides to reduce forward splash The MudSling is injection molded from resilient polypropylene with a fine texture matching other plastic surfaces on the GS It is precisely shaped to capture the lower portion of the existing fender and fit tightly against the frame Designed to