... 3)style:stand up with zipper bag 4)with bottom gusset and tear nick Featire:1)snack bag with clear window2)material:PET/PE3)style:stand up with zipper bag4)with bottom gusset ... bag, vaccum bag, retort bag, pet food bag, seafood bag, coffee bag, meat bag, snack bag....The style can be flat bag(three-side sealing), pillow bag, heat cut, stand up with/without zipper ...