Versatile and robust the UltraSil Nano Tarp Poncho from Sea to Summit. The poncho is a rain jacket and backpack cover in one and can also be stretched over the sleeping bag at night as a rain protection. The 15D UltraSil material is extremely light and yet amazingly robust. The siliconized material is waterproof, the seams are all glued so that no moisture can penetrate even at this weak point. At the corners the poncho has special attachment points for guy lines, so you can use it as a tarp. The cut of the poncho is designed in such a way that even larger backpacks can be carried underneath without any problems. This way the equipment is guaranteed to be protected from all storms.