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in addition to the shockproof and digital protective compartment for computers, the backpack also has a large space for small items such as luggage. a high-quality computer backpack can be used as a sports travel bag. the fabric is usually waterproof and wear-resistant. the sports backpack is very jumping in design and bright in color. sports backpacks have different functions in material and workmanship, so there will be differences in quality. fashion backpacks are mainly used by women. most of them are made of pu materials, and some are made of canvas fabrics. they are large and small in size. pu bags are usually used to replace handbags that women must carry when they go out, while canvas backpacks are also loved by primary and secondary school students as school bags..syi