What better way to celebrate the chilly season than with the signature winter Reformation sale? Fortunately, the reader-favorite dress destination’s biggest sale of the season has arrived with a bang. For a limited time, get up to 40% off select styles, from signature flirty dresses and skirts to polished office-ready pants and sweetheart tops. We suggest a fashionable level of urgency for this one, folks. The cutest ‘fits are bound to sell out before you know it. Plus, with free shipping, there’s not much else you can ask for. Keep scrolling to check out our top sustainable picks from this once-in-a-winter sale.