Summer concerts, picnics and just reading in a field are all great activities that provide a few choices for enjoyment. One can drag along a big beach chair or camping chair or bring a small blanket and seek out a tree or something else to lean on for support.
A cross between a mat and a chair, Leano is about as minimal a seat as one can develop. It fits easily in a backpacknd weighs almost nothing. The entire constriction is a long sheet of fabric (which appears to be about 80″ long) draping off a rod and two 19″ long stakes that prop up one end. The fabric protects the backside and legs from grass, dirt or sand while the poles prop up the back.