Tyvek is a nonwoven product consisting of spunbond olefin fiber. It was first discovered in 1955 by DuPont researcher Jim White who saw polyethylene fluff coming out of a pipe in a DuPont experimental lab. 

Among Tyvek's properties are:

• Light weight
• Class 1 flammability rating.
• Chemical resistance
• Dimensional stability
• Opacity
• Neutral pH
• Tear resistance

Tyvek Has been used as "housewrap", Envelops by UPS/Fedex, Clothes, Shoes, Caps, wristbands, etc. And We Make Our Backpack from Tyvek, The Backpack made from Tyvek is Supe Lightweight, Water Resistance and Strong, It Has A Feeling Like Paper Yet Tyvek Make It Strong As Fabric.   We Added One Small Pocket In Front Of The Tyvek Backpack So That It Is Easy For You To Access Offten Use Items Like Phones, Keys, And There Is A Middle Size Pocket Inside The Backpack For Your To Put Your Wallets Or Other Items. 

With Our Printing, We Can Print Your Designs Onto the Tyvek BackPack As Well. Custom Your Tyvek Paper Backpack Now. 

Size Of Our Tyvek Paper Backpack: 

Width: 30cm; High 38cm, Base: 15cm.