These non-medical, reusable, reversible, unisex masks are made using upcycled cotton fabrics, with super soft dual head straps and a contoured shape for a comfortable fit. Side opening for adding disposable filters (optional). Each pack comes with four reversible masks in assorted colors and four antibacterial meltblown poly filters. Hand wash cold, lay flat to dry. Do not bleach. Low iron if needed. Wash masks before use. Wash your hands before and after handling your mask. Not for clinical use.