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the most important feature of the postman's bag is that it is single shouldered and has a flap. the original canvas fabric is still used, but the leather material is also very popular. the postman's bag is perfect for a leisurely weekend party. it can simply contain some necessary items and will not appear embarrassed that there are only a few scattered items in such a large bag. for the busy elite office workers, the practicality of the postman bag is particularly prominent. generally, there are multiple inner or outer bags, which are easy to store and have higher security. the postman's bag is relatively square and rigid as a whole, giving people the impression of being stable and professional, and its internal capacity cannot be underestimated. the postman's bag is more convenient to use, and its storage capacity is much larger than the hard briefcase of the same size. it also looks more energetic and capable to carry..syi