I've been very pleased with this zafu (which I ended up choosing, because it was the cheapest one I could find, which looked comparable to the $40-60 cushions available elsewhere). The material is a heavy, soft cotton, it's stitched well, comes generously stuffed and there is a zipper on the side so you can adjust the heighth by removing some of the filling.I feel very stable and grounded on this cushion. I'd been sitting on flat ground for two years, before finally breaking down and buying a zafu, that I almost feel spoiled with this. It's made meditation much more enjoyable for me. I can sit much longer than I could on flatground and without any discomfort.