The Sea to Summit Ultra-Sil Nano Tarp Poncho is a raincoat, pack cover, groundsheet and tarp all in one! This tarp/poncho is made of 15D Ultra-Sil Nano fabric, is super lightweight, and packs down incredibly small. This waterproof tarp/poncho easily converts from rainwear to a 2-person shelter with guy attachment points. The side snaps together for rain protection when worn as a poncho. It’s super tough with a double-stitched, tape sealed, 3-panel hood construction.