Activital Duct Mask White 3-piece SET Urethane Mask 2244 yen I bought this for work because it's less likely to fog up my glasses. It's washable, so it's convenient. I think it's best to wash it before using it for the first time. Good for jogging and sports clubs, too. Recommended for those who wear glasses. Reason for sale: Please refer to the images. (Please check the manufacturing date) Ear-hook type mask with a double filter - Model name: Activital DUCT MASK 748 yen - Exhaust duct with 2-layer filter - How to use: Ear-hook type #SportsClub #Work #GlassesWearers #ProtectiveGear #WashableMask