Baetis Soft Hackle - Soft Hackle. During the winter months Baetis begin to emerge below the surface of the water. Some get dragged by the current and eventually drown or get stuck in the shuck and end up being a still born. The Baetis Soft Hackle should be fished in the surface film of the water where it is a sure thing that in no time at all you will be pulling trophy winning trout out.