This product does not contain elastic. Just a thread that can be tightened. We have a post on the back of the camper where the spare tire is, so I put enough string on the rope and fed it through the post. The queue is long. Hopefully it will hold up and the cover stays on the spare wheel when driving and windy. This company had the case in stock and other companies had 4-5 weeks, that was one of the reasons we ordered from this company.