Bottom: flat/star close / pajama close or as your requirement
Waterproof: laminated(10-35gsm/㎡) or PE liner in it.
Usage: sand and building material, industrial and mining powder, Chemical and transportation, agricultureand so on
Sewing: double chain, over lock sewing, leak-proof sliver
Feature: water-proof, leak-proof
UV treated: common standard ，long time standard.
Advantage: save cost, high resistance, convenience for packing goods