Tarpaulin
Okay, let’s just call it tarp, it’s the same. A tarp is a strong waterproof material. It is commonly used for protecting the tent floor, especially for tents with a thin bottom.
It can also be used as a rain shelter for your alfresco dining area or to protect your camping gear from getting wet. You can also make a tarp tent out of it. If you’re into minimalism, a tarp might just be enough for you.