A detachable warmer insulated with a Vintage check wool and cashmere blend. Designed to button into the interior of our Chelsea and Kensington fit Heritage Trench Coats, as a warm, protective lining. Please note, this item requires an in-store appointment to have your warmer fitted to your trench coat, Outer: 80% wool, 20% cashmere, Lining: 100% viscose, Filling: 100% polyester, Dry clean, Imported