These disposable surgical face masks are convenient, essential personal protective gear. Each mask features three layers of protection with a middle layer constructed of electrostatic mini-fiber filtration material. Repels contamination of dangerous liquids. 90% dust and powder efficient. FDA approved. 3.7" x 6.9". Disposable. 50 masks per package. Limit 1 package per customer. One size fits most. NOTE: This item is FINAL SALE and may not be returned or exchanged.