We are committed to providing good quality products and services to our customers. --Product Benefits. 1. The hair bands are made of rust-proof metal, which is very strong and difficult to be broken. Each headband has 2 protective sleeves on both sides to make it safer and more comfortable. 2. The metal headband has many wavy and spiral teeth, so it has a good grip, which helps to hold the hair firmly to ensure that the hairband will not slip off easily in the hair. 3. Suitable for most age groups of men and women, it is very lightweight, suitable for fitness and various ball sports, running, cycling, hiking, etc.. Also suitable for daily wear: yoga, laundry, bathing, beauty, dancing, attending parties, etc. 4. When you feel it has deformation or asymmetry on both sides, too big or too loose, you can hold it on both sides and bend it inward, and it will become smaller. When it is too small or too tight, stretch it outward and it will become wider, making it fit your head shape better and can be bent and freely adjusted as you like.