The Birkenstock Boston Pro 2.0 is a true classic that can be worn year-round. The sole provides comfortable and secure footing thanks to its two components: a polyurethane (PU) midsole and a lightweight, non-slip, and dynamic polyurethane (TPU) outsole. The outsole is also repairable, making this clog perfect for everyday wear in the restaurant industry. The upper is made of high-quality, particularly soft natural leather coated with polyurethane (PU). The midsole is made of polyurethane and the lightweight, non-slip, and oil- and hydrocarbon-resistant polyurethane (TPU) outsole is also made of polyurethane. Regular Fit. Complies with EN ISO 20347:2022. Color: Dark Brown.