>>1401678To my best knowledge that would be a ground mat (either regualar closed-cell foam) or inflatable (but insulated!) combined with a down sleeping bag and a tarp. A good idea is to look at what the ultra-light heads are using since they're autistic about this.
Learn to set the tarp right and in different conditions like using trees and with poles for when in the open. Also learn to set it very snug, so you keep the wind out. Buy a light tarp and maybe consider a small ground tarp as well.
