What Our Gearhead® Experts Are Saying:"The extra thickness is noticeable from the first night, sleeping closer to a mattress than a pad. The adjustable firmness lets me dial it softer for side sleeping without losing support, which most self-inflating pads don't give you."Why We Like ItThe Air Zone construction maps insulation to where your body actually contacts the pad and pulls it from the areas that don't need it, keeping the weight down without dropping the R-value. The result is a 5. 3 R-value that covers three-season conditions without the bulk you'd expect from a pad this thick.