These boots truly are the best. I have worn them everyday for the last nine months at the South Pole. They are tough, warm, and stable. Most boots you find down here at the end of the world (bunny boots, FDX boots) are ankle-breakers and lack traction. My Sorels are a cut above. They have kept me warm through our frigid temps (-10F to -100F) without issues. On the coldest days when I'm planning on standing around outside I add foot warmers, but otherwise they are great. After 9 months of solid use well below freezing, the rubber uppers of the boots have cracked, but they are still as warm as the first day I used them. I'm planning on buying another pair once I'm off the Ice and headed to the Arctic. They are a little bulky and heavy if you're not out in the elements, but you won't find a better boot.