Since i'm confused by the answers to the others, I just wanted to double check:What's the difference between the Momentum Hybrid and the Momentum Fleece? I'm trying to pick between the two. If it helps, wind is a factor.

Look at my review of the Momentum Hybrid 1/4 Zip Jacket. The outside is smooth and the inside is fleecy...I would say between a light and medium loft fleece. Definitely more loft and warmer than a micro-fleece lining that you find lining many shell jackets. Assuming this is the same construction and material as the 1/4 zip version (and from the description, it seems to be), this thing is very little protection against wind or any percipitation. This thing does NOT have any DWR and it will provide no protection against rain...think sponge. This will provide excellent warmth and breathability for aerobic activities. It will also act as an excellent layer under shells for winter activities. Look at my review of the 1/4 zip version for my thoughts on fit and improvement to this.Also, I am not sure what the commentor below was referring to, but I did not find this be a shell. The exterior is smooth rather than fleecy but I wouldn't call it a shell by any means.