Easy and glossy fabrics like silk, satin, or polyester blends is often really slippery. So they won't maintain your ponytail as tightly as other fabrics. You may as well make a scrunchie without sewing by substituting glue for your stitching. I like to recommend using a strong, fast-drying fabric glue. https://allhealthmarket.com/product/hair-extensions-wigs/human-hair-weaves/ponytails/long-pony-tail-natural-braided-ponytail-2234-extensions-black-hairpiece-with-hair-tie-rubber-band-hair-blonde/