I'm not too sure if I interpret these right, but wouldn't this material be tailor-made for a weightless sail that can compress itself 20 times? Wouldn't this b

I'm not too sure if I interpret these right, but wouldn't this material be tailor-made for a weightless sail that can compress itself 20 times? Wouldn't this be a revolution for boats, lifebuoys or seaplanes? Also, wouldn't this allow human-size people to carry around weightless wings on their back that expand 20 times from 50cm to 10 meters in span, letting them fly like birds? Edit: I know these ideas have no scientific basis. I'm just surprised that the only mentioned applications of this material are lithium batteries, waterproof clothing and the likes. Surely there would be a lot of things to create out of an essentially weightless solid.