RAB's Nylon Ground Cloth is both light yet durable and highly waterproof. Corner pegging loops.
Rab says: Light-weight and versatile designed groundsheet that can also double as a basic tarp or wind shelter.
RAB's Nylon Ground Cloths are made from 70Dernier coated nylon so they offer durability and a high degree of waterproofing. Pegging loop at each corner.
Rab points out that it could be used as a tarp as well, but a few more pegging loops would have made that a better prospect.