The reclosable poly bags are perfect to use for packaging or packing merchandise as well. The 5x7cm zip bags can be used for herbs, small parts, shipping, handmade goods, soaps, and cards . The reclosable clear poly bags have a really reliable zipper. The seal is strong and the lock is secure. Using these resealable bags not only will save you time but also money! The plastic bag is made of high quality LDPE - it is pliable and incredibly easy to use.