When you first used this hair tie its really tight but even then its gentle on the hair, it doesn’t break the hair, doesn’t leave a mark/dent, doesn’t pull. Its been almost 4 months since I’ve bought this ties, I’ve only used one and its streched a lot, like double its original size (i have long, thick hair and a lot of hair) but i can still used it (the ponytail doesn’t go down), there was a point when it hadn’t streched enough so my ponytail felt loose but i just kept using it and now its perfect. The material/fabric its fantastic, the color and glow its intact, as the first day. I love this ties, im never going back to the regular ones, totally worth it. You can even sleep comfortably with this ties.