The resulting chair is really comfortable. It feels like sitting on rubber bands. The trick is to have narrow enough spacing and a tight-enough weave so that your weight is evenly distributing across as many lengths of hose as possible, which will in turn evenly distribute the stress on the hose, preventing sagging and long-term decay.
The overall form is quite reclined, with an interior width of about 22". Assuming the hose is recycled (garden hose would work as well, though it typically is made from thinner rubber), the only other materials are one 2'x 2' piece of 3/4" plywood and four 2' x 1/2" dia. threaded rods with nuts and washers. There is almost no waste from the process, making it quite efficient for both the environment and your wallet. Out-of-pocket costs are about fifteen-twenty bucks, depending.
Step 1: Framin'
Lay out your pieces, and cut with a circular saw, jigsaw, or bandsaw. Cut the leftover center piece into four roughly equal pieces, or two pairs of matching pieces. I made the back legs a little wider than the front.
Lay the legs on top of the "Ls" and play around with them until you have both an angle of recline that you feel comfortable with as well as a decent height off the ground. My version is only about a foot from the ground to the seating surface at its lowest point. Run a straightedge over the feet to derive the angle at which they will meet the ground and cut off.
Glue and screw the legs to the inside of the "Ls."