Men's Nunn Bush Oslo Venetian Slip-On Shoes The Nunn Bush Oslo Venetian Slip-On delivers clean, classic style with a versatile design suited for work or dress occasions. Its smooth upper and hand-stitched moc detailing create a polished look, while the slip-on construction and padded interior help keep each step comfortable throughout the day. A durable outsole completes the shoe with steady traction for everyday wear.