Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
Read online reviews about this brand being one of the best and really warm but unfortunately even with two pairs on, my wife's feet are still icy to touch after wearing them for over several hours. They look really nice and feel very comfortable but not great value as they don't keep you that warm. Still 3/5 as they are well made socks.