package white to red around the convergence

5) package white to red around the convergence of Pi Xian, very thin, straight, very round, this is also the general factory can not.
To be divided into two categories, one is nylon or rayon, is characterized by waterproof, wearable, easy to pierce; second is canvas, canvas advantage is very close, comfortable, easy to wash and looks more generous , but it alone does not waterproof. When the surface of the canvas to add some water to protect materials, or in the middle of two pieces of canvas with waterproof layer, which has a waterproof function. Two kinds of material each have their own advantages, consumers can according to their own 6) are lined with leather lined with canvas serial number, skin, skin down, the first layer of skin with eye observation.
7) metal zipper with easy good nature, high cost of such a zipper.
As the package is a three-dimensional point of view so all packages are geometric shapes, concave and convex order, not rugged.
9) dust bag serial number.