I knew the moment I discovered these in your online product review they were far superior to any others I'd been looking at. Also, I've bought boots & shoes from Overland over the years and I know the quality in your products is second to none. The absolute top features are: 1) they are fully lined in sheepskin from the shank down and including the foot bed; 2) the ice grippers are built into the sole so they can be flipped over for icy conditions & then flipped back when not needed, truly an innovative feature; 3) they are waterproof as opposed to water resistant; 4) the lace-up is fully adjustable, but the ease on/off of the side zipper is so wonderful for people with high arches and insteps. They arrived just in time for our polar vortex freeze-up in the Colorado High Country! Can't say enough good about them - so glad I purchased them.