Review of Loop Opti 180 Dry Fly Box. I did my research before this purchase and was convinced that this was the best dry fly box currently on the market. However, within seconds of putting flies into it a serious problem became obvious. The box is undeniably very well made, and the design of the layout is perfect for a selection of trout flies. However, due to the dark blue background in the compartments, the flies become almost invisible behind the lids in anything other than the brightest direct light - leaving you to guess which flies are in which compartment. I am now planning to carefully remove the lids and paint the bases of each compartment white (using the appropriate model paint). Hopefully, that will resolve this issue. I will also add small squares of magnetic tape to the three smaller compartments in the lid (which only has a single lid across all three compartments) to avoid small dry flies from being blown away when the lid is opened. I guess the grey-coloured alternative is probably much easier to see the flies in, but I actually do really like the blue box - it just needs a paler background in the compartments in order to see the flies better. Without this issue, it would definitely be a 5-star verdict as the rest of the box is spot-on.