I bought 3 pairs in November 2018 and all 3 have problems with holes and tears. One had torn stitches in the crotch in the washing machine fairly early, maybe late December. One had recently fallen apart near the left knee, so there was a huge hole and the seams on the seat were torn. The third pair is mostly fine with a few tears on the legs but no major holes. They're fairly warm and comfortable, and while they don't stretch, the extra panel in the seat allows for an amazing level of mobility. They're warm enough that I don't feel like I need more layers with them and my work pants up to 28F. They're definitely a warmer material than my nylon Buck Naked Duluth pants, they just don't fit as well. Even if I have to replace them next winter, they did the job for me and they're cheap enough not to blow my wallet to replace next year. If you're looking for seasonal base layers that don't mind being replaced after 3-4 months of regular heavy use, these will work until the seams in the crotch or seat come loose.
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