I like this (or at least the past iterations of it) as a wool mid-layer:
http://www.llbean.com/llb/shop/70861?page=shetland-wool-sweater-crew
+1. But it has to be green or it won't keep you warm.
I wear mine frequently when Nordic skiing in colder temperatures, with or without a shell depending on the wind. (OK, not so frequently this year …)
Here's my inventory, arranged in increasing order of warmth:
1. LL Bean Shetland sweater, linked above by cushetunk. 14 oz./400 g Does an amazing job even when I'm perspiring.
2. Woolrich Buffalo Check Plaid shirt (23 oz./650 g) or US Army surplus field shirt (24 oz./670 g) (both 80% wool/20% nylon). What to wear when you want to be surprisingly warm.
3. Woolrich Wool Alaskan shirt (30 oz./860 g) (also 80/20). What to wear when you don't want to be surprised by the cold.
4. 300-weight fleece jacket (20 oz./548 g) (almost always worn under a shell, 'cuz it's virtually worthless in a high wind otherwise). OMG, will it ever get cold enough again to wear this?
Using down for a midlayer makes little sense to me, given its compression under a shell and its tendency to absorb perspiration. For the record: I own three down jackets and cherish every opportunity I get to wear them. But that almost
never happens on the trail in New England below treeline.
