Made of polyester yarn material, elastic, durable and sturdy, not easily deformed, comfortable to wear. The armband width is 2cm, Unstretched circumference 32cm, fit for arm circumference: 8.67 - 19.68 (22- 50cm), easy to adjust, suitable for most people. Wear them on upper arms, secure the sleeves in place to prevent the sleeves from sliding down You can show them outside, also can be hidden in sleeves according to your need. Suitable for business man, staff, teacher, office workers, waiters etc, suitable for any occasion, easy to match any clothes. Perfect for customizing the length of your sleeve and keeping your cuff from getting ruined, can be great gift to your family or friends.