Fit: soft, secure and adjustable elastic loops fasten around base of head for a comfortable snug fit, eliminating irritation behind ears. If the bottom seems loose, tie a knot to the bottom band to tighten the fit - Made from two layers of cotton - Comfortable contoured design minimizes gap between face & mask - Washable & Reusable - Environmentally friendly - machine/hand washed and dried - Packed in individualized plastic packet