This is a premium gauze mask that uses an "e-PTFE filter," also used in medical settings. This is a set of 10 masks. ・Reusable and washable ・"e-PTFE filter" cuts 98% of bacteria ・The three-dimensional space created by the top and bottom pleats makes breathing easier (creates a comfortable space around the mouth, reducing stuffiness) ・More comfortable than non-woven masks, as the inside doesn't get stuffy when worn ・Uses soft, flat elastic that is gentle on the ears ■Condition New, unused ■Size Approximately 85mm x 145mm ■Reference Price 396 yen / 1 mask (equivalent to 3,960 yen for 10 masks) ※Please understand that this is a personally stored item before purchasing. ※This item is also listed on other sites, and may be removed from sale at any time.