With the development of science and technology and the times, notebook bags are also of various colors and can be divided into two types: computer bags and inner bags.

　　1. The styles are not limited to men's and women's, and more unisex bags have been launched one after another.

　　2. Sizes 10.6, 12.1, 13.3, 14.1, 15.2, 15.4, 17-inch and other bags are already on the market; with the launch of more notebooks of various sizes, manufacturers of computer bags are also quickly launching matching size bags; at present, the market is generally dominated by 13-15 inch bags.

　　3. Materials (fabrics) include: ballistic nylon twill nylon fine text nylon of various levels, reinforced multi-fabric, nylon, Levitz leather, real cowhide, etc.

　　The protective layer materials are various levels of memory foam and ordinary sponge.

　　The so-called inner bag is distinguished from ordinary notebook outsourcing, such as backpacks, handbags, etc.; the outsourcing focuses on carrying functions, and it can accommodate everything inside; while the inner bag focuses on protection; it is equivalent to the jacket and underwear of a beautiful woman; all liners do not have a uniform size, and must be customized and produced according to the size of the notebook! Even if it is the same size, there will be slight differences in size due to inconsistent brands of notebooks, such as For the same 14.1-inch laptop bag, the thickness of Lenovo or BENQ is about 0.5-1.0 more than that of DELL. Generally speaking, if you decide to buy a laptop sleeve, you need to do a "measurement" of your favorite phone in advance. ", know its accurate length, width, and height, and then you will be prepared for the purchase.