I am a huge fan of the long-sleeved t - always with a crew neck. I like to layer them under summer t's and tanks, extending the wearing season of some of my most favored garments. When it gets even more frigid I layer them on top of each other and snuggle them under sweaters.
As with many favored garments, the LST rose to the top of the list through trial and error. There are many impostors out there - garments with material that is too bulky, or sleeves that are too long, or a neckline which doesn't lay flat. Being a girl of most particular tastes, I am always on the lookout for the "perfect" long-sleeved t. Two of my very favorites are by Gap and H & M.
I have several of the Gap Favorite T. Available in a mini-rainbow of colors, I find this T to be made of super-soft cotton, with well proportioned sleeves and a lightly fitted body. Long wearing (I last purchased these in 2001), they make a solid, casual layering piece.
My newest favorites are by H & M. (Unfortunately they don't have online shopping so I don't have an image to share.) I recently obtained a buy-one-get-one-half-off coupon (a benefit of being a Facebook Fan of H & M), and was giddy at the prospective of using it on some new Fall fashions. What did I come away with? Two perfect LST's. One is thin, and black, and made of a silky-soft blend of cotton & Modal. The other is also very thin, but white & ribbed. The black one looks dressy enough to wear as a layering piece with Sunday clothes, and the white will be an ideal foundation under a thick wool sweater. At $12 each (before the coupon), these are a great bargain. And if they hold up like my other H & M t's & tanks, I'll be enjoying their cottony warmth for 4-5 years to come.