Great mitts that I wear on all my outdoor adventures. Here is what I've experienced with them so far. I've stayed warm in these mitts down to -25°C with moderate activity. I've stayed dry during a rainy winter day. In extreme wet conditions they have become wet through out; that being said, they dried super fast and still kept me warm. Standing still (no activity) at -20°C, I had to wriggle my fingers to keep them warm. Sheep leather seems really tough, I do lots of trail breaking hence, lots of twig/branch snapping and some of them are pretty sharp yet leather is intact. Totally satisfied with these! *** according to size chart I ordered Large mitts, which were a tight fit. I exchanged for XL for a perfect fit.