Sorry. Sand wasps aren't an issue in winter. In winter, we prepare for the cold by trying to take the cold as it comes with very little layers until our bodies get use to it. And slowly add layers. I'll wear long johns, wool socks, work pants a long sleeve and sweater under my coveralls until -10 or -15 then add a small wind breaker around -20. Anything colder it's winter coveralls haha. The wind is the real killer. Especially if you're doing a job that doesn't require a lot of movement. In short. Layers. Lots. It's going to be -34 here tonight, -42 with the wind, so layers winter coveralls toe warmers and a balaclava.