We have bought a Polaris 12 man tent from CEC, the actual tent is fabulous.

We went camping in April and at night we were freeziing cold-o.k the weather was cold 3 or 4 degees.
I was just wondering if deferent materials are more cold than others,if you know what I mean.
It does not have a built in groundsheet but now i have sorted that and its as good as built in now.
It was a very cold weekend but just wondered if some materials were warmer than others.
thanks
Andy