G'day Sarah,

It will take a few days of being left open in a warm spot once the mat is first received, as it's been in a factory compressed state for a long time.
After a couple of trips the foam cells inside the mat will have been well worn in and fully open.
The mat will inflate itself as much as possible, each time when the valves are opened up, but like with all self inflating mats (especially the 15cm ones) you'll likely need to pump abit of air in for a firmer sleeping surface.
Theres a range of different mattress pumps available here, the coleman quick pump may be your best bet.

G'day Dale,

If you're currently on a thin thermarest, then both of these options will feel like ultimate luxury! The Hexatherm is a great option if you want something made with high quality materials, a nice soft touch top finish, and a bag that doubles as a pump sack to help get your mat inflated in record time. The Kozi isn't quite the same quality, and doesn't come with a pump sack, so if you don't have a few hours to allow the mat to really inflate well, then you'll need to pack something to assist the process. 

One other option to throw in the mix is the Oztrail 3D Fatmat 1500, it's similar to the other two, however has the same inflation assistance requirement as the Kozi.

Overall my pick would be the BlackWolf Hexatherm.

G'day,

The pump comes with a range of attachments that make it compatible with pretty much any mat on the market.  The attachments work with both the deflate and the inflate ends of the pump.
The valves on the BlackWolf mats work with the flextail on 'inflate' with ease, but it can be abit fiddly on the 'defalte' function as the attachment isn't larger than the valve flange on the mattress.