Size/Fit Summary: Fits slightly smaller, Slim fit. If you are in-between sizes, it is recommended to size up. Fully waterproof, the Women’s Refined Stitch Roll Top Sherpa Boots have a neoprene calf, which is lined with vegan shearling to keep you warm in temperatures as low as -5°C (23°F). Finished with a foldable cuff, a welted top-stitch and a platformed outsole for grip and support, these new green and cream boots are available in a matte shade.