>>1414368what do you have? what is the climate/avergae winter temps you will be sleeping in? what is your budget? These are all important questions you should answer for yourself before you go out looking for a winter sleeping system.
get a mummy with the correct rating for your climate, whats most important is the base, many people on a budget use two sleeping mats in very cold weather (e.g. closed cell pad below a self-inflating mat). When comparing mats look at the "R-Value" which is a measure of insulation, the higher the better.
