Bought the Rukka Outlast long sleeve shirt. Cheaper than heavy Merino whoop and supposedly more apt for the cold.
Fit is as advertised, material is very soft and doesn't feel plasticky like some other Outlast shirts I've had. Have been riding in it a bit and works great, basically can replace a mid-weight Merino layer in the cold. Will have to see how it does in the heat where past Outlast shirts did less well, but we're off to a promising start.