https://www.costco.com/fltr95-sealing-face-mask,-100-masks.product.100670394
.html
FLTR95 Sealing Face Mask, 100 Masks
★★★★★
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Item 1428311
Your Price259.99$
Shipping & Handling Included*
这个N95比国内卖的还便宜,国内要35人刀一个,costoc 只要2.6美刀=21人刀一个