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.
I would have preferred a woven material - but that was my mistake. As a non-woven fabric, it is good and the zips work well - which is usually a problem. I would recommend this product as it is good value for the sum paid.