If you’ve ever camped, you probably know that sleeping pads, alone, do not keep you warm. This is because a typical, inflatable camping pad is not particularly well insulated and, therefore, doesn’t store heat. So when it comes to winter camping, you want a pad with a lot of insulation, which is expressed as an “R value.” Typical pads have an R-value of somewhere between two and five. Any pad with an R-value over 5 will be noticeably warmer. When it comes to winter camping, though, warmth is the one thing you should not skimp on. Get a high-R-value pad, like the Exped SIM Comfort 10 LW. It’s an extra-thick pad that comes with a mini-pump. At 25.6 inches, it’s wide enough to move around on without hitting the tent floor, and with an R-value of 9.5, it’s good for temperatures as low as 54.4 degrees Fahrenheit.