They make excellent glove liners. They are not intended for long-term autonomous use. As with the cold weather base layer, they make an excellent insulating layer under large gloves. I use them under thicker gloves for housework. The product page contains contractual statements about the composition of the material at the time of writing this article. I checked the Rothco website for these gloves to make sure they were 70% merino wool and 30% nylon. Here is a link to the Rothco glove size chart[.]
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