G'day Adam,

Not a known issue at all.  The only advice I can think to give is to make sure the valves are fully sealed shut, and the little bits of silicone flaps are seated correctly.  It's really unusual to have 2 mats with the same issue, if there is a fault, so if theyre both doing it it could be because they're new? Self-inflating mats can take a few trips or uses to reach full potential, having the fabric and foam fully expand and relax after being compressed from the factory and sitting in storage for so long.
They may be softening overnight and feeling like they're going down, instead of actually going down.  The other thought is that a lot of self-inflating mats do require some additional air to make them firm enough, so you could use something like the mini Exped Widget, or even just blow them up manually to make them really nice and firm, and see if that makes a difference.

See if any of that helps, and let us know if you're continuing to have issues.

G'day Sue,

The only manual pump that is compatible directly with the Sea to Summit mats is the Air Stream Sack, which is incredibly efficient and allows you to add extra air quickly.

G'day Gayle,

Self inflating mats are generally a much better option then simple foam options, however, they cannot be folded.  If you've got a trifold foam mattress because that's integral to packing up your camper, bare in mind you'll have to remove the self inflating mat and roll it up separately when packing away.
If you need any further advice on the best option for you, give us a buzz on 1300 914 007.

Comfort is a bit of a personal thing, Rachelle, in my opinion you can make either mat just as comfortable as the other. The main difference is that the Zempire may has more foam inside which means it doesn't need as much air for inflation but is a little harder to compress for pack up.

The Sea To Summit mats are made with a little more technical design, or what they call their 'Delta Core', hence the higher price tag, it has less foam which makes them more compact and easier to pack away whilst still providing the self-inflating functionality bit require a little more air pressure to create the desired comfort.

I hope that helps.

~ Ben

Absolutely. Comfort is very individual so I'd recommend trying to get to a store and trying one out, but these mats are jsut as good as the other high end comfortable self-inflating 10cm high camp mats on the market, Steve.

G'day Siobhan,

We've had alot of questions on the comparison of these mats over the years. The Sea to Summit Comfort Deluxe and the Exped Megamat 10 are very similar. They EXPED LXW and the Comfort Deluxe Large Wide are essentially the same size in use and packed up, and have a similar feeling soft fabric on the top. One main difference is the type of foam insulation, the Sea to Summit mat has Delta Core™ PU Foam which leads to slightly faster inflation, and a lower R-value (it may not be warm enough in snow type conditions). The Exped has a very high R-value and will, therefore, suit all conditions, but may take a little longer to inflate, and could require a little bit of extra inflation from the mini pump that's included. Overall, both are excellent mats, and its generally pretty difficult to make a claim on which one is better.

No worries!  If you do decide to grab one of these, we'd be interested to hear your thoughts on comparison with real-life use.