The Fendor-Bendor is the original folding fender directed on fixed gear and road bikes, mountainbikes and cyclocross bikes. http://www.witindustries.nl
It's the ideal rear fender (mudguard) for cyclists who prefer to not ride with fenders, but sometimes do appreciate some protection. It's foldable into a flat package of only 21 x 10 cm (8.3 x 3.9 inch) that fits into a cycling jersey's back pocket or can be stored in backpack.
The Fendor-Bendor 3 is completely designed and produced in The Netherlands out of 100% recycled and recycleable plastic (Polyproplylene). The flat material gets a 3D shape by folding it on the lines along its length. It is easily slid between the frame and around the seat tube, where it attaches with a simple 2 in 1 velcro closure.
It is available in black and white and with various prints. For example the special artist editions with illustrations by Dutch artists.