... 50D 36Fx16P polyester and nylon, ,sealed by laser or ultrasonic cutting,washed by 18MΩ ultra-pure water and double packaged ... kind of edge type are optional(Lasing cutting, ultrasonic cutting sealing, ultrasonic cutting embossing sealing)Products Information: NameSpecificationsizeN.W.G.W ... is weaved with 75D 36Fx16P polyester and nylon,sealed by ultrasonic cutting, and washed by 18MΩ ultra-pure water ...