If you ride a bike, you need a fender, and if you need a fender, you probably will like the Musguard, a removable, rollable, polypropylene bicycle fender. Simple as can be, the Musguard is lightweight (35 grams) and easily attached: unroll, fold the seam, and tighten the Velcro strap. Remove it whenever you want by undoing the strap and rolling up for storage (see what I mean by easy?). Now on Kickstarter; see video below for demonstration.
Designer: Jurij LoziÄ from Ljubljana, Slovenia.
MUSGUARD on Vimeo.