Cased caddis are crunchy on the outside and soft in the middle much like a perfect loaf of fresh baked french bread. As these caddis move about in search of food they sometimes become dislodged and tumble downstream where trout take advantage of the crunchy snack. This pattern is tied on a barbless hook.

The following are the bead sizes per hook: 

Size 12 - 4.6 mm