High peak sleeping bags will give you temperature rateing suitable for the season you are camping in.If you are camping in the fall,spring,summer,or winter they will rate the sleeping bag you are buying. In a lot of cases you will buy a sleeping bag a little warmer because you can always open it to vent if you get a little warm. you will need to put a sleeping pad under neath it to keep the ground temperature out of the bag and to make it more comfortable. So look at the temperture rating when you buy a sleeping bag.
