Hair Ties MaterialThe hair coils are made of Soft sturdy and durable thermoplastic polyurethane which no punnt smell and no metal,The spiral hair ties are ntle on your hair,spiral design will prevent taning and prevents hair breaka Mighty Hair Elastic and resilience The dieter of elastic hair ties are 2.17 inches and 2.5 inches in dieter.DED coils hair bands stretch freely and copiously to lonr size to hold up all of your hair in a ponytail,my bun or braid hairstyle Waterproof Hair Ties for GirlsPe coil hair ties are non absorbent,no nasty wet feeling when you swimming or bathing.After used for a long time,just simply soak it in a cup of warm water or use a hot blow dryer to make it recovery the original size No More Hair Headache& Dent32 assorted colors special pony tail hair bands also spreads the "prure" of the hair elastic out over a greater surface area of your hair,which minimize the scared ponytail dent that the tradital hair ties will on styled hair Versatile Hair Ties for Girls: These hair accories for women also will be a giving and sharing to girls,who want to be in fash.Besides daily using,the flexible hairtie suitable for: sports,yoga,workout and other activities.