In the Northeast once the banks are frozen, you need 2 things. First you need Midge patterns. And second, you need something blue. The Winter Blue pattern has been in my midge box for a few years now and is one of those killer-or-bust patterns. Whenever I find midging trout, it's usually one of the first patterns I reach for. I'll know within a few casts whether I am going to have a typical midge day, or a phenomenal day. They either kill this pattern, or they ignore it completely. It has accounted for my best winter midge days on several streams in central PA, and my best day ever on the Tulpehocken tail water.