like the fact that if they stretch out I can use boiling water.soak in a bowl and they go back to normal!! Others I have to toss out when they stretch out plus these hold my hair really well. Multi-Color: Our hair ties extremely soft & so many colors to choose. You can choose different colors according to your dressing, daily mood, daily activities to create your hair in your own style. The diameter of elastic hair ties are 1.97 inches and 2.17 inches in diameter, but don't be deceived by its size! DED coils hair bands stretch freely and copiously to longer size to hold up all of your hair in a ponytail,messy bun or braid hairstyle.and also can be worn on your wrist as a hair bracelet when not in use. Give zest to your fashion hairstyle and lifestyle. These hair accessories for women also will be a gift giving and sharing to girls,teens,toddlers,kids and children who want to be in fashion.Besides daily using,the flexible hairtie suitable for: sports, gym, yoga, workout and other activities. It also a handy hairband to help you make buns, to hold your ponytail hair or whenever you need to put your hair back. It's a good gift to your female friends. The hair coils are made of Soft sturdy and durable thermoplastic polyurethane which no pungent smell and no metal,The spiral hair ties are gentle on your hair.