By Paolo Sandoval Handsome, rugged, sustainable — and now you can add “on-sale” to Outerknown’s list of descriptors. The outdoors-inspired retailer just kicked off it’s Semi-Annual Sale, and trust us, it’s not one you want to miss. Discounts are up to 60% — a pretty big deal given the brand’s general aversion to discounts. The Semi-Annual Sale has hundreds of items marked down, from discounted cold-weather favorites to see you through the last weeks of winter to spring essentials primed and ready to revitalize your spring wardrobe. Even the famous Blanket Shirt, a luxuriously soft, IH-approved…