"Or, take it back and get a better option. Montbell has some nice options that weight less and are probably warmer. On the lighter end of the scale, there's the Montbell EXL (zipper but no pockets) or the UL Down Inner (pockets) are nice options and much lighter than the Revelcloud. Lots of people use them on this site including me. Very small and packable too."
+1 Lots of warmth for the weight, high quality, reasonable prices.