Kevin, I didn't say "all" I said "many." But, all of my IBEX clothes are made in the US. A quick random scan of their products on their website shows many are US made, but not all.
As for Icebreaker, yes they make good stuff and use quality Merino. I've been using their wool since the mid-90's when I went to NZ frequently on business. I've met the founder several times and talked with him extensively about wool, the US market, etc. He's been quite a success story there----from startup to booming business. During the '90s, I spent quite a bit of time working on wool-related issues, including working with WRONZ (the Wool Research Organization of NZ), a top-flight reserach and development operation for the wool industry in New Zealand. Although wool was popular elsewhere in the world, it was only then making inroads into the US outdoor market. This was because of the recogniation that Merino was the way to get around the "itch" factor that turned everyone off (at least in the US anyway). As regards the US market, Smartwool was a pioneer and deserves credit for getting wool back into mainstream use.
Smartwool's socks used to all be made in the US (not long ago). I don't believe they are now. In fact, I don't think any of their wool products are made in the US (I may be wrong on that).
For those of you who don't think it matters that we're seeing a continuous loss of manufacturing capability and expertise, do you really think there is a happy ending to that trajectory? If so, what does it look like? Will we really be better off that we've given up the knowledge and innovation that comes from making things? Will we really be better off that we're allowing the rest of the world to make everything for us? Not likely.