Cory Williams’ (The Fly Shop, Redding, CA) wog has been thoroughly tested on thousands of Alaska silvers and chums.
The widebody of hair displaces and pushes lots of water. The foam ensures this version, like many wogs, doesn’t drown when the hair gets waterlogged. It fishes much longer.
White foam is also very visible in white glare.
This fly should be swung waked with continuous basspopper pulses pop and drift, pop and drift. Silvers are helpless to resist this action.