Dear customer: All of our mask has "YYaaloa " Card in it,please make sure that this mask you bought form ''YYaaloa store'' before placing the order.
Material:Cotton+Activated Carbon Washable. Please kindly Wash prior to wearing it the first time.
This mask will keep safe your mouth by protecting from all dust, air polluted place, vehicles smoke, and sandy air. It is the anti-dust even in changing weather.
One size fits for most people Flat .Size:approx. 17 x 13.5cm/6.69"*5.31"(not include the straps)