Hi All!
I'm looking to buy a sleeping pad for a world tour next year, with fairly simple criteria: to be the lightest, most comfortable and durable thing which can be rolled up and stored in a pannier!

I've read through the forums, and wrestled between the:
Thermarest (Prolite)
Big Agnes (air core)
Exped (Synmat 7).

I'm happy to spend the money if it's worth it, and so I've carefully considered the Exped (despite the extra 200 odd grams), since it's meant to be supremely comfortable.

My main question is this: with the presence of fibres (whether synthetic or goose in the downmat), would the hot air and humidity of hot/tropical climes being pumped into it every night eventually cause the pad to deteriorate?

I have plenty of other questions for my tour, but wanting to start buying equipment for shorter tours this year I'm anxious to sort out my kit!!
Thanks in advance for all your help!
Cliff.