The 9 X 12 reclosable poly bags are perfect to use for packaging or packing merchandise. The 9x12 zip bags can be used as garment bags , clothing bags , attire bags , tshirt bags , and t shirt bags. The reclosable clear poly bags have a very 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 virgin LDPE - it is pliable and incredibly easy to use.