Tipi Walter - "And merino layers are heavy. Take forever to dry when clammy and/or wet."
When you said this I thought of this thread here on WB about 2 yrs ago and on BPL. The merino layers aren't all that much heavier and don't take forever to dry comparably. I think you have to consider what was said on that WB thread and what BPL researched. FWIW, I don't see a 1/3 to 50% dry times to be the end all be all when making these comparisons. When I'm carrying two tees possibly a synthetic or a wool/synthetic blend AND a 100% merino dry times play less of a critical role in many of my hiking/weather situations. And, again it appears we're falling into mistakenly seeing things in apparel as a duality...either synthetic or wool...and that is not the case. For example there are blends and new treatments of both merino and synthetics.
http://www.whiteblaze.net/forum/arch...p/t-98385.html
http://www.backpackinglight.com/cgi-...l#.VlPbhPmrSUl