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.
Great boots so far. I’ve worn them most days and have done some long walks in them. Very comfortable and supportive. I’ve had no problems with rubbing or blisters. Generous fitting especially in the width. I’ve not truly tested if they are waterproof but I have worn them in the rain, no soggy feet. I just hope they stand the test of time.