RIO FIPS Euro Nymph Fly LineOne Size Fits All European Style Nymphing Line RIO's updated Euro Nymph line has been thoroughly vetted and approved by FIPS Mouche as "Compettion Legal". A system of special marks on the line has been endorsed and approved by FIPS Mouche, ensuring that competitive anglers do not have to waste valuable fishing time by having their line checked during competition hours. The Euro Nymph line was designed by Steve Parrot to satisfy the need for a one fits