What's a cold weather shirt?

In all honesty, they're only needed for post-season - and not each week in the post-season at that (last year's stae finals I dont think I saw any crew wearing long sleeves and there were night games, too).
BUT, if it dips below 70, we're scrambling to find where we stored ours.
As far as I know, everyone has whatever run-of-the-mill long sleeve that Honig's has.