This user from instructables goes by the name of nnewlon. A member of his family has developed some mobility problems leading to the need of using a walker.
Having some issues using the walker provided by the hospital, he started using the "Ultra-Light Rollator", made by Medline which had only one problem: the walker unfolded too easily since there was nothing to keep it folded. This makes the transportation of the walker, while not using it, way harder than it should.