The Comfort Plus Insulated is the warmest and most comfortable of the Sea to Summit Sleeping Mat range, featuring 548 individual air sprung cells and insulation to ensure a great nights sleep, wherever you may be. The Comfort Plus series are formed using Dual Layer construction—two independent, offset high resolution layers. The higher resolution cell matrices allow greater sensitivity by distributing your body weight and shape over more small cells. The air sprung cells on the top and bottom layers are offset to give more uniform insulation, preventing cold spots. The mat’s firmness can be more finely tuned with Dual Layer construction – The bottom layer is inflated firm for height, then the top layer inflated to the desired comfort level. If either layer is punctured, the other layer will provide redundancy, keeping you off the ground and sleeping uninterrupted. This mat is the perfect choice for anyone looking for the ultimate in comfort and support, without the mat being too heavy or bulky when packed. Due to its warmth it is suitable for cold climate camping and 4 season use.