1.6 oz polycro (if not using tent)
8.3 oz Ridgerest 20×48 inches
21 oz Montbell SS UL #3 down bag (30F EN tested)
This is good down to 30F, a little lower if I carry and wear a jacket.
I'm still undecided whether or not I'm going to keep using the Ridgerest rather than the Exped SynMat UL7. The RR is lighter, simpler, and more durable.