The most sophisticated, durable, efficient, simple, discreet, reliable, unique, soundless (not more clanking), light, eco-friendly, good looking bicycle fenders in the world. And they are free :)
Am I exaggerating?
UPDATE: After almost a year
six months of everyday use in the city (loads of rain), it’s still in perfect condition! I’m genuinely excited with this hack, it really is the best bicycle fender your money can’t buy!
Finally! The tutorial is here! Take a look to the detailed illustration (click on it and then zoom it to the actual size) and if you have any problems understanding something let me know in the comments section.
Also, I forgot to put it into the illustration that if you can put reflective stickers on the back of the fender so the drivers can see you in the dark. It even looks cooler that way.
UPDATE: Put some pieces of wire to support the construction (check out the blue one in the pic bellow)
UPDATE No2: Check out this post for more info
In real life it looks like this: