noun
hair tie; hair elastic
A small elastic band used to tie hair, often covered with fabric or made of rubber. Common everyday item.
髪ゴムが切れたので、新しいのを買わないと。
My hair tie broke, so I need to buy a new one.
ポニーテールにするときは、太めの髪ゴムを使っています。
When I put my hair in a ponytail, I use a thicker hair tie.