Review on 🏞️ 9x9 Heavy-Duty Black Drawstring Poly Tarp - 8-mil Thickness, Item #500998 by Douglas Jakab

Recommended use led me to believe this tarp has a flap that can be laced up so it can cover something like a pool or sandbox as a cover. But there is no valve so I don't know what the tip is supposed to bring. You definitely can't use this to tighten down a surface with a lip underneath. The lanyard can be reached from four corners, but you need four points to hook into those corners to use it.