Another spectacular thing I got at this show was this neat fold up plastic fender. It looks to me like it's only really going to work well on bikes that don't use caliper brakes, but since that's like half my bikes I've decided to keep it in my bag at all times.
Check it out.
water bottle for scale
it clamps around your seattube and the cutouts are for your brake bridge
pretty cool. stoked to try it out.
thanks Dutch guy.