The BOC series of chironomid pupa fly is a super effective, “on the bottom” imitator where fish typically feed on darker pupae! But don’t be fooled as the BOC’s have also proven very effective mid column as well! If the bows are stuffed with pupae but not very many are popping tie on a BOC and get it down deep … oh and hang on! As with all our flies the BOCs are tied for you the exact same way, and with the exact same materials (including the full body KRAZY glue coating) that we tie it for ourselves! Available in two (2) different rib colours (Red & Copper) and three (3) effective sizes (#14, #16 & #18 2X).