- Button Front - Strom Flap - Front Pocket Welts - Crystal Embellishment - Custom Camilla Hardware - Stretch Denim The Heirloom Empire Longline Belted Trench Coat Denim is designed by our in house artisans and masterfully cut by our manufacturer in Istanbul. A wardrobe staple reimagined, this longline trench coat is crafted from flexible denim with a button front opening for effortless wear. It features front pocket welts, custom camilla hardware and crystal embellishment for luminous detail.