The ability to protect yourself from the elements will not only increase your chances of survival, but will also bring you comfort! Having a form of shelter is essential when lost and alone. Always bring an orange tarp or silver emergency blanket. These can also be used as signalling devices.
Tents can be very effective in sheltering from rain or wind and can allow for a safe place to sleep. A tarp can be very useful in creating a makeshift shelter to keep a person dry. It may be the difference between getting hypothermia or not.