Oswego Suede Leather in Color Cork Brown | BIRKENSTOCK US。The Birkenstock Oswego Suede Leather Slip-On Shoes for men are a stylish and comfortable option for casual wear. Featuring a round toe shape and slip-on closure, these shoes are made of high-quality suede leather with a synthetic outsole. The beige color and solid pattern make them versatile for all seasons, while the leather lining and insole provide added comfort. Designed by Birkenstock, these shoes are a modern twist on classic slip-on style, perfect for outdoor or everyday wear. Brand new without box. There is a little residue left inside the shoe from where I removed the price tag. Please see pictures.