The fabric is more than adequately waterproof (2000+ mm hydrostatic head) for the intended use (storage inside a backpack or duffle)

1-GALLON GRAVITY WATER FILTRATION SYSTEM

6oz (18g) Dimensions: 6 1/2" (165mm) when unfolded

TENSILE STRENGTH:The resistance of the material to breaking under tension

Pendant: Dinosaur Agate climbing carabiners The fabric is more thanThe Natures Trail Collection from Crystal Creek Gems is all based on Silicon Dioxide. That is, if you will, dirt and sand. The gems we use are in crystal form and include: Crystalline Quartz (clear crystals, amethyst, etc.) Micorcrystalline Agate and Caledony Micorcrystalline Jasper Geodes Microcrystalline Fire Agate Agatized Fossils Its very unlikely you would find any of these hiking our Appalachian Trail. So we try to show places mostly in the USA