This is a mammoth of a midlayer. Both wooly and lofty, as the name implies, it is a low-profile and lightweight midlayer with extra loft in all the right places. The entire liner is crafted out of anti-odor, moisture wicking merino wool -- comfortable, soft to the touch, easy to slide on and off under your shell or winter jacket. Even the fill is a wool-blend, meaning the extra cushy spots are nearly as breathable as the rest of it, making this jacket a versatile layering piece.