Ultra-high molecular weight polyethylene (UHMWPE) bulletproof fiber and X-PAC Ultra-high molecular weight polyethylene (UHMWPE) is a high-functionality resin with a molecular weight that is several orders of magnitude higher than that of conventional general-purpose polyethylene (PE). It is light and has excellent impact resistance, abrasion resistance, and chemical resistance, so it is widely used in super high-strength fibers, bearings, body armor, and artificial joints. It is a very suitable fabric for domestic mountainous terrain with lots of rocks and sharp brush. The x-pac fabric, exclusively produced by Dimension Polyant, is a special material made for outdoor use. It is used for yacht flower wing because it has very strong tear tension by attaching a transparent film instead of pu treatment. Weight : 480g Capacity : 25L Zipper : YKK PU Coating Buckle : WOOJIN PLASTIC Backpack Main Skin : ROBIC / UHMWPE 100D EXT-BLK R Backpack Bottom & Side Skin : X-PAC vx21