Mattress Extreme - Thin and superbly light, this 3 mm mattress adds warmth to any sleeping setup. You can, for instance, use it under an air mattress for puncture and moisture protection and extra insulation. The reflective surface bounces back some of the warmth you are shedding, helping keep you comfortable. - Extremely low weight (approx. 155 g) - Elastic bands included for packing During summer time you can even use this as your only mattress, if you have absolutely no need for physical comfort, or if you find a spot of suitably soft ground. The packaging has false information on the mattresses size. In reality, the mattress is 181 x 55 cm in size.