While humans have slept outdoors since long before tents were invented, they do add a bit of comfort. It comes in brown and silver.
VEVOR Blue Tarp w/ Thickness Of 5 Mil Tent in Gray | 0.01 H x 144 W x 120 D in | Wayfair
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VEVOR Heavy Duty Tarp 10x12 ft, Waterproof Plastic Poly Tarp Cover 10 Mil, Multi Purpose Tear UV and Temperature Resistant Outdoor Tarpaulin with High Durability Reinforced Grommets (Silver/Brown)