The Ninja Underscarf provides complete coverage of your head, neck and ears. It allows you to wear all kinds of hijabs, while providing total coverage. These are made of a comfortable and breathable fabric. Providing complete head, hair, ears and neck coverage. Designed in such a way that it offers no bulk to the wearer. We love these with our shayla, especially the see-through ones. Great for sports and going to the gym. One size fits all.