I’ve always had to use two hair elastics whenever I work out (thick/heavy hair!), so when I saw an ad for TIY, I was intrigued because it solved my problem of needing a stronger ponytail holder. I’ve done several workouts using them now and my ponytail did not sag, even during a run! They are much softer and stretchier than the hair elastics I would buy from the drugstore in the past. It may take a little trial and error to see what works for you; I like two loops for everyday use and three loops for my workouts. I also like how I can wear them on my wrist during the day and they aren't so tight that they make a dent on my arm. You can even stack them to look like bracelets. Great product!