Hair elastics are small bands made of stretchy material that are used to tie or hold hair in place. They are commonly used to create ponytails, buns, or secure braids. Full definition
When you are tying your last hair elastic, do not pull out all your hair at the last twist. (stylecraze.com)
Secure this bun with a big hair elastic twisted around it twice. (stylecraze.com)
When you're short on time, a simple hair elastic and a couple of pins can help you to look your best with a quick and fashionable hair style. (blackplanet.com)