To keep also the other end of your body warm, have a look also to the Bison Wading Socks.
Material: Bison wool • Machine washable • Size S, M, L, XL • Weight 60-70 g • Colour black or brown
Moisture regain is a measure of the amount of moisture a fiber will hold without feeling wet and therefore more comfortable. The capacity of moisture regain of bison wool is higher than sheep wool and therefore more comfortable to wear. The wool from the buffalo's undercoat is spun and knit into a light, soft, durable glove.
Consider this beast from the Old West. The bison had a great deal of time to develop a fur with a highly insulating undercoat, which will not let it freeze in wintertime. It was almost wiped out by the European settlers in order to deprive the natives of their important food source. In 1870 remained less than 1,000 bison from a stock of possibly 50 billion. Its protection began when Yellowstone National Park was established in 1872. Today the population has increased to more than 500,000 whereupon most of them are kept in private farms and less than 5 % are maintained in conservation herds.
The bison gloves are probably the warmest garment one can get on a per-square-inch basis. The bison 'down' is not only warm, but it's also incredibly soft. It gets fuzzier and softer the more you wear it. While you might think this is a signal that the gloves are falling apart, that is not the case. The yarn fibers are just relaxing. They don't shrink and are even machine washable.
Yes, these glovs are not cheap, but consider one adult produces just about one pund of bison down.