Unused. This is a ground sheet specifically for the FOX-BASE, sold by Future Fox. ◎ Unlike ordinary, flimsy rectangular ground sheets made of poly material, this one has a very high-quality feel and covers the entire hexagonal space. This reduces the entry of sand and dust from strong winds, as well as rain, and especially helps to prevent the entry of crawling insects (centipedes, ants, pill bugs, etc.). ◎ The multi-layered construction of PVC on the back and polyester on the front makes it very sturdy and thick. It's of such high quality that it can suffice with just this one sheet and a thin mat, even on somewhat uneven ground. The FOX-BASE is also for sale. Please consider it as well.