This is high quality and low weight/space air mattress. The inflated mattress is 197x65x7cm and packet size in a bag 15cm dia x 28 cm long. No need for a separate pump as it has a built in manual pump, and with a fibre fill, the cold does not come up from the ground through the mattress.
I took this on my OzLap, but found that sleeping on the ground is a lot further from standing than it once was, and this sleeping mat is now surplus to my needs. I've slept on it about 6-8 times. RRP is $209 but it can be yours for $100 plus postage.
Rather than posting my own photo, full specifications and details can be viewed on Exped's web site, listed below.
http://www.exped.com/australia/en/product-category/mats/synmat-7-lw