If you get them, make sure to store them in a place where you're sure there are no moths, or else take steps to prevent moths from eating them.
I bought a set of top and bottom merino long johns several years ago in an after Christmas sale and put them away in an old footlocker I use to store backpacking things. Months later, when I got them out to use them, they were full of holes. I don't mean one or two, but a dozen or more holes. I don't remember what I paid for them on sale, but retail was $100 or more, down the drain.
Some people have told me that they come equipped with moths from the store. So when I got replacements, the first thing I did was to freeze them in my freezer for a month or so to kill any hitchhikers. Then, even though it gets my wife's nose out of joint, I put some moth balls in with them when I stored them. No more holes, although my wife still complained about the smell of moth balls two weeks into our backpacking trip.