Diamond Ripstop Series * 1050 HD Tuff Cloth * For Durability and Reliability North Star Uses # 10 HD Construction Grade Two Way Zippers. * North Star Gear Bags Feature a Full Wrap of HD Webbing for Strength and Support of even the heaviest of Loads * All Stress Points are Double Reinforced and Box Stitched Internally for Lasting Durabilty and Strength. Inside of the 1050HD Tuff Cloth is Dura Coated for Content Protection.