Basket windshield + windjammer type protection definitely the best, as jw indicates. For my money, though, and the very limited amount of (critical) outdoor recording I do, the Shure A81WS work great for me. Their coarse inner foam core provides a volume of air around the mics, sort of (more so than other foam options, anyway), and they work quite well. Can't compare to small foam + dead rats, as I've never used them in combination.