This cool and comfortable mask uses "TASTEX COOL-EX (xylitol processed)" material, which provides a cooling sensation upon contact. It's designed to be breathable for comfortable wear even in hot weather. It's an eco-friendly, reusable mask that can be washed, making it hygienic and economical. Includes 10 replacement filters with dust-proof, antibacterial, and deodorant effects. The ear straps have adjusters for size customization. It's a free-size design suitable for both men and women. Product Name: Hiya Mask (TASTEX COOL-EX) Color: White Contents: 1 mask + 10 replacement filters x 4 sets Condition: New, unopened Seller: Cox Co., Ltd. Will be carefully packaged and shipped. Instant purchase OK, anonymous shipping available!