The breathable Yaki closure is made from 100% human hair. It is 100% hand tied to a piece of fine, soft mesh that allows air to pass through easily. Thanks to the hand-tying technique, the hair appears to be The hand-tied Yaki closure is made of 100% human hair. It's expertly crafted on a fine and soft mesh piece, allowing for easy airflow. With this hand-knotted technique, you'll achieve a natural and undetectable look.