I'd been shopping around for a mid to heavy-weight fleece that could fit layers underneath (including a light fleece vest for added warmth), but could also fit well under my shell parka. The Marmot McCloud perfectly fulfills my needs. I tried out some obvious choices, such as one by Columbia, The North Face Denali, and the REI Muir Woods. The Denali was too bulky, expensive, and not versatile because of its heavyweight fleece, the Columbia one was a bit too bulky and featureless, and the REI Muir Woods was too light and featureless. The Marmot McCloud fleece sweater is a bit expensive, but the added features (pit zips, etc.) and excellent quality make it a great value.