I have yet to find anything available here in the states that is 100% wool and in that price range. The Stoic Merino 150 fabric is a 60% merino/40% polypropylene blend.

However it seems that BackCountry has the SmartWool Micro 150 (100% Merino wool) on sale right now... down from $75. http://www.backcountry.com/smartwool...F0MTExMTAxMzA=