A baetis hatch of a mayfly cycle is a great time to fish for trout, but they're still choosy about what to take. Pack a couple of color options, including Juan's High-Def Baetis from Montana Fly Company, and you'll be sure to have something they'll want to eat. This 12-pack keeps you prepared for baetis hatches, and since they happen throughout most of the year, that's a lot of fishing.