ROCKBROS Ear Warmer (Ponytail-compatible type). It's designed to be cold and windproof, and is recommended for outdoor activities on cold days such as running, cycling, walking, and commuting to school or work. It also has reflective material printed on it, so you can feel safe at night. - Unisex - Stretchy (Recommended head circumference: approx. 56-65cm) - Lightweight and comfortable to wear - Can also be used as a helmet inner *Please purchase only if you understand that this item is stored at home. Instant purchase is OK.