I’m obsessed with any top that has this thumbhole kind of sleeve because it’s a cool look. This rayon-blend shirt is very low cut, but it comes in a zillion colors and looks great for the weekend. It’s available at Nordstrom for $68 in sizes XS-L. Free People ‘Malibu’ Thermal Top
Here’s a plus-size option in the same rayon/spandex blend.
Update: the top is now marked down to $41 in the big winter sale at Nordstrom.