Drawstring Mask Elastic. Sew in for an adjustable fit. Just slide the bead to easily adjust the length so that your face masks will fit anyone. The elastic is 90% nylon, 10% spandex, very soft and extremely comfortable on the ears. The bead is 100% PVC. The loop is apporoximately 8" (4" folded in half) and it stretches up to 12". Machine wash and dry. Do not iron. 60 count.