Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
These socks have a padded tab for some reason on the back of the heel. It pressed against the back of my heel when it hit the back of my shoe, right on the tendons, which was uncomfortable. Seems like a terrible idea, not sure why it's there. Ended up returning the socks.