The thickness of your sleeping mat is important when you want a little extra comfort or just get off the cold ground. You may have an extremely warm sleeping bag but by adding a thicker sleeping pad, you’ll get even more insulation. Choose a thick mat if you think the ground will be cold or hard and you’ll stand a better chance of getting a good night sleep.
Choose a thin mat for warmer climates or if weight is an issue. After all, sleeping mats have the greatest ability to provide extra warmth and comfort when you need it most at the end of long, hard day.