<p>I tend to be cold in the winter and like to wear a tank top under my sweaters. As I have gotten older, I find the wool blends bother me, so I am on the hunt for a thin shirt to wear as a bottom layer. I prefer something long sleeved as my arms start to get itchy, so maybe a crew neck shirt would work. Most of my sweaters are v-neck or crew neck, so something I can throw on underneath in maybe a white or cream color. Cotton that is machine wash and dry would be terrific, but open to anything.</p>
<p>Several of my wool sweaters hit at high hip, and I like my shirts a bit longer, so I wear a slim fitting tee in a contrasting or coordinating color that hits at lower hip. But any tee shirt should work. ( I like tees from Boden or Jcrew) Long underwear might be too warm depending on your working conditions.</p>
<p>I usually wear cashmere or merino wool, they don’t bother me. I also wear synthetic fleece, but that might be too casual for offices outside of Seattle.</p>
<p>I think collared shirts under sweaters are really cute, but they are never comfortable to me cause I squirm around too much. Silk shirts seem to go smoother under the sweaters than cotton.</p>
<p>I’m amazed that for someone who gets cold in the winter you have been getting by with a tank top under sweaters. I also get cold, and wear a turtleneck under sweaters. Then when it gets really cold I wear a tshirt under that! </p>
<p>Columbia sportswear makes several style women’s long sleeve shirts for layering. Most of them are the “omni wick” material and layers nicely under wool sweaters.</p>
<p>I see someone already suggested cuddle duds. I’ve heard they are great, but haven’t purchased any myself. I can’t wear much wool, because it’s too itchy with only a tank on, and I’m too hot with long sleeves under wool. </p>
<p>Also, if you tend to be cold in the winter, stop wearing cotton. Moist cotton (which it will be if it’s next to your skin) wicks heat and does not insulate at all. There are good reasons why experienced hikers say “cotton kills.”</p>
<p>Dmd is correct - cotton is not great as a baselayer. Helly Hensen is another brand that makes nice “engineered” fabric shirts that are great for adding warmth without bulkiness. </p>
<p>I like Uniqlo HeatTech items as invisible layering pieces and occasionally wear their turtleneck versions as well. They add warmth with little weight, zero bulk and wear like iron, laundering beautifully . Very reasonably priced. I wear their HeatTech bottoms under jeans or pants and love how they add warmth without being confining. </p>
<p>Great suggestions; I will be checking these out. We have no control over our office temperature; walk into one one and the AC is running, but the room next door has heat! When I wear a sweater I prefer a thin shirt underneath as I might be too hot at work; at home I throw on a sweatshirt jacket when cold. </p>
<p>As many of my sweater are fitted, I think I would prefer a undershirt with some lycra and fitter, although the silk might do the trick assuming I will not be too hot in them. When I wear a cardigan, I usually have a regular blouse underneath and seem to be comfortable, unless I enter the room with the heat blasting!</p>