biots are sorta fragile,,thats another downside to them,,,but they do look great,,one way to help them be a little easier to work with is take a washcloth and damp it place a bunch of biots in there and fold the cloth over on it, they will be a little more plyable, i like Jon Barr's pure midge larva personally. easy to whip through them from a tying standpoint and they are very very durable.