Astro Insulated is a full 2.5" thick. Lateral baffles make the pad feel wider and smoother, and 75D polyester fabric resists puncture while keeping the weightdown. Astro Insulated uses a thin layer of polyurethane foam welded to the inner surface of the pad to stop convective currents and create a very consistent and even insulation. Use the valve for inflation, or attach the optional Disco Pad Pump for a speedy setup. Astro pads include a stuff sack, compression strap, and repair patches. Use Astro Insulated in combination with the Pillowtop when comfort is a priority. The removable layer of comfort foam nested in a washable microsuede cover adds extra insulation.