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I've been riding in 5.10s for years now. Started off with the Impacts which were pretty waterproof from the outside and warm, but acted like buckets once the water got in via the big hole on the top. Have switched to Trailcross with waterproof socks (pretty good, the shoes dry out quickly but they're not very insulating) and more latterly Trailcross gtx (too soon to make a firm judgement but initial impressions are good). Pedal grip with the Trailcross is excellent.
Also used waterproof Decathlon hiking/approach shoes, and a pair of waterproof winter boots from Merrel. These were both pretty good for staying warm and dry while bikepacking, especially with mini gaiters, but pedal grip was not nearly as good.
Been considering some proper mtb shops recently.
Until now I’ve gone from riding in sandals in spring/summer/autumn straight to waterproof Karrimor hiking shoes in winter.
Anytime I’ve ridden with people wearing five tens in winter they’ve winged the whole time about how cold and wet their feet were. It’s been a while though, maybe they’re better now?