The Spyder Eiger Wool T-Neck Midlayer is a great, lightweight option to help keep you warm on the mountain or even when you just want to be active in the cooler fall weather. It's got a soft and cozy Merino Fleece which will keep you comfortable wherever you wear it and it looks sharp enough that you could easily get away with wearing it on a consistent basis. The Eiger is a tried-and-true Spyder midlayer that's worth checking out. [+]