Read about camping gear
You can get a conventional sleeping bag that zips up around your chest. There are also mummy style sleeping bags which can zip all the way up and around your head! You can get a sleeping bag that suits your needs as far as temperature range, material and color criteria. Padding or mats for underneath your sleeping bag are also good to have. Depending on your comfort needs, padding is available from blow up mattresses to foam egg crates. At night you can be warm and comfortable with the right gear.