... .1%. This rate is much higher than normal standard of 98%1.Soft, lightweight, comfortable, odorless2.Fiberglass free, Latex free earloops ... .Material:3-Ply 20gsmPP+20gsm PP+ 25gsm PP2.Dimension:17.5×9.5cm3.Packaging: 50pcs/inboxes 2000pcs/ctn4.Customers logos can ... wrap and spot welding,middle ply is filter,blue,17.5*9.5cm