[100 PACK] Breathable Black Sponge MaskStyle No : YDPS PDSM BLK 20BAG Material: Stretchy polyurethane one layer sponge foam Condition: NEW Included: 100 PACK (20 bags x 5pcs per bag) Suggested Age Group: Adult Care + Wash: Although this sponge foam mask can be washed & reused more than once, sponge foam is naturally fragile & short lived. Stretchy 2mm thin one layer sponge foam material. Gently hand wash the mask with soap to reduce naturally occurring unpleasant odor from sponge foam