I had one of the original Rab top bags (with the mesh bottom) and found it drafty.

Does anyone have experience of the more recent offerings?

A few quilt* users on Rich ... most seem pretty happy. I don't really find any of mine draughty, however I am usually in a bivvy bag too, so maybe that's the difference?

*very similar to a top bag.

Stu, do you now of anyone who does bag conversions?

I've got a cheap bag with 900 down on the way.

I have a Rab Module, never used, but when I do I'll post up my thoughts on it

I've been using the Big Agnes Mystic SL15 which is a top bag with pocket on back to slide in a sleeping pad for ground insulation, I have not found it to be drafty. They do an excellent job of making sure the connection point between the bag insulation/pad has overlap enough to seal the drafty areas. Because I am extremely slender I sleep a bit cold in it but that's not unusual for me. I've thought about getting a womens bag so there's less air space to warm inside the sleeping cavity. I don't think a person closer to average build would have any issues with this bag/sleep system. Did the Divide in it this summer and no real issues to report.

Stu, do you now of anyone who does bag conversions?

Mat at UK Hammocks will convert bags to quilts for a very reasonable price.

Thanks Stu.