To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Very small zipper clasp, I bought this when I searched “upholstery zipper”. Spent hours replacing them onto my sofa cushions and then when I put the covers back on the sofa the zipper pull fell off. This is not a hearty enough product for anything that actually needs to stay together