These Frost River Northern Pacific Waxed Canvas Mittens are built with superb craftsmanship and durability—they truly feel like they'll last a lifetime and could be passed down through generations. The waxed canvas sheds snow and water beautifully, and they keep my hands comfortably warm in teen temperatures with minimal activity. For sub-zero conditions without much movement, I'd recommend pairing them with liners for extra insulation. That said, they're worth every penny; you definitely get what you pay for in premium quality and performance. I can't praise them enough—just don't lose them! As for size, I used their sizing chart and picked the size that was recommended for my hands, and they ran a little large. But that little larger size does provide an ample air gap to keep my fingers warm.