The orange survival bags are really just oversized orange bin liners and you'll sweat more than a weight watcher in a cake shop waking up damp.
As @Harry Palmer says, your better off without those orange survival bags and go with something that's breathable, if the temps dip you'll wake up cold and damp, I don't think the roll mats alone are enough, some sort of inflatable mat on top of it, preferably insulated but it's down to cost, what sleeping bags are you using.