A survival tent or shelter is a temporary structure designed to provide protection from the elements in emergency situations, such as during camping or survival scenarios. The goal of a survival tent or shelter is to provide a safe and secure place to rest and protect yourself from harsh weather conditions, such as extreme heat, cold, wind, rain, or snow.

There are many different types of survival tents and shelters available, and the choice of which one to use depends on a variety of factors, including the environment, the expected weather conditions, and the resources available. Some common types of survival tents and shelters include:

1. Tarp shelter: A tarp shelter is a lightweight and versatile option that can be set up in a variety of configurations using a single tarp. It can provide protection from rain, wind, and sun.

2. Bivy sack: A bivy sack is a compact, lightweight shelter that is designed to be used with a sleeping bag. It is often used in mountaineering and backpacking, where weight and space are at a premium.

3. Emergency shelter: An emergency shelter is a pre-made shelter that is designed to be used in emergency situations. It can be made of a variety of materials, including Mylar or other reflective materials, and is designed to retain body heat and protect from wind and rain.

4. Tent: A tent is a more substantial and durable option that provides protection from the elements. Tents can be freestanding or require stakes to set up and are available in a range of sizes and styles.