... x4.25") Main fabric polyester 420 denier black Itemgood quality and good function rigid polyester 420 Denier black laptop computer briefcaseMaterialSynthetic PUSizeSize ... optionsScreen printing (often to use on bags made by polyester, nylon, cotton, PU leather),High frequency emboss (often ... ,Embroider (often to use on bags made by polyester, nylon, cotton, Spun fabric). sublimation heat transfer(for ...