My husband is allergic to down, so we don't have any, so here are my non-down suggestions.

I have Carharts and Apocalypse design wear.

I also wear polar weight thermals by L. L. Bean (specifically Power Dry Stretch Base Layer.) I have a lot of wool shirts and sweaters by Ibex, Icebreaker, Smart Wool and others.

The warmest boots I've ever found are the White! Mickey Mouse boots from surplus. Also very important is a very good warm hat.

HTH.