Backpack 1.Factory price,Good quality 2.Experienced and professional ... same time,Custom design and logo are welcome,Material includes canvas,oxford,nylon,polyester,cotton and PU.WHERE IS OUR MOJOR ... Non woven:75g,80g,90g,100g2.Nylon:190T,210T 3.Canvas:6OZ,8OZ,10OZ,12OZ,14OZ,16OZ,20OZ4.Polyester Oxford : ... inspection our factory and negotiate the cooperation. 2012 the newest canvas backpack for exercise