The M.C. Hammie ($100) can be used as a聽hammock, shelter,聽or blanket.
Integrated carabineers and straps聽allow you to lash it聽to a tree for afternoon naps, included tent stakes keep the four corners of the DWR-coated ripstop聽nylon on the ground to build it like a tent (you'll need to attach it to a tree or bring your own poles to support the body). Or just lay it flat on the ground for聽picnics on the beach or in the woods.