Squidders said:I had a lay down on the expedition one and it was fairly uncomfortable... maybe I just have a heavy rear end but it hit the deck through the mat when I was laying down.
I may have a look at the larger one they recommend for car camping and just be a man about lugging it about :roll:
If any part of you body is touching the ground through the mat then you just need a bit more air pressure in it.
It doesn't realy matter what the users weight is any thermarest can be fine tuned for comfort.
The way to do this is over inflate the mat by blowing into it, then lay down on it. The mat will feel very firm and not very comfortable, while still laying on it let a bit of air out at a time. With any thermarest the maximum level comfort to be had will be at a point when you sink into the mat as much as you can without touching the floor. If you do touch the floor, just let a little more air back in. This will only work when you are laying on it, if you just sit on it of course you'll touch the ground beneath.
What shop did you go to? the shop staff should realy have known this.
It does not make a difference what your weight is, you could use a pro lite no problem. And to be honest, unless you're sleeping on concrete, there is not a great deal of comfort to be gained from the thicker thermarests over the lightweight ones, as long as you know what you're doing. So I say keep your pack light and go for the Pro lite.
I hope that was of use to you.