I imagine the 2.5 tog would be warmer than a halo fleece sleepsack. As pp mentioned, the grobags have multiple layers and are much more like a quilt or sleeping bag. I ordered a few 1 tog and 2.5 tog grobags from mamabargains and I'm loving them (as is DD.) It's still too warm here for the 2.5 tog but she's been sleeping in the lighter grobags. It was amazing to see the difference when I got them though. The 2.5 tog really is pretty thick and very warm looking!
Last edited by Snow mom; 10-23-2009 at 01:30 PM.
momma to DD 12/08 & DS 3/13