I had an erosion problem along my creekbed and used the 8" and 12" edge borders to help keep the dirt on the bank from flowing into the creekbed. These were really easy to use by attaching them to an existing 4" border that wasn't tall enough - wished I would have bought these instead of the 4" borders I previously bought from Lowes. Very sturdy material yet flexible and the the strips for attaching the boders worked great - no problemo. Very satisfied so I bought a bunch more of these and they worked great - nice product and reasonably priced - thanks Vevor!