down compacts to ruffly 1/2 - 3/5 the size of synthetic.
i have a full UQ in synthetic and a king size synth TQ and i like them both.
the UQ i use the synth.for 35deg and warmer. i have a down 3/4 that i use on below freezing trips.
the down seams to radiate/reflect body heat better and faster.
Last edited by flatline; 12-04-2012 at 20:00..