Just ordered a couple lightweight Smartwool tops on sale:

http://www.backcountryoutlet.com/out...ve-Womens.html

and

http://www.teamestrogen.com/product-view.ep?pID=101270 (right here on TE, in black)

These should be good on our boat when it's warm and as base layers during cooler times of the year. The black one will be nice under my (one and only) black Shak!