14 inch square hammock, double story bunk beds or add on as many stacks as you want with this design! This design also allows for easier cleaning, replacing only the levels that need to be replaced. I can make the other kind too, where the levels are stitched together, but in my experience with having hundreds of animals through the years, especially with destructive and messy baby squirrels, this modular design with metal hanging chains is the most durable and long lasting. 
 
Any design that can withstand a brood of 12 baby squirrels from infancy through release, gets a win from me.
 
Each bunk layer is a sandwich made of quilting cotton (which is meant for the outward facing side), a Zorb inner absorbent layer, and a patterned (or solid) fleece layer meant for the inner facing side that the animals sit on.