Torso Double Hammock Back Carry (Base-4) (Full Tutorial) 

This video demonstrates how to wrap a short Torso Double Hammock Back Carry with a woven wrap approximately four sizes smaller than your base size.
Torso carries are very low back carries. If you don't have any experience with this style of carry, I would recommend waiting until baby has some good trunk and neck strength (starting to sit up on their own) since the lower position makes it harder to monitor baby's positioning.
Torso carries are particularly comfortable in the heat, and having your arms completely unrestricted makes them great for getting chores done while wearing your baby.