The BIRKENSTOCK Boston Pro is a veritable classic that can easily be worn all year round. Thanks to its two components, the sole promotes stability and comfort. It is comprised of a midsole made of polyurethane (PU) and an anti-slip, dynamic and lightweight outsole that is also made of polyurethane (TPU). The outsole can furthermore be repaired. Therefore, the clog is particularly well suited to day-to-day wear in kitchens and restaurants. The upper is made from high-quality, particularly soft natural leather which is coated with polyurethane (PU). The PU coating makes the material vapor-permeable and regulates the climate in the clog. All Boston Pro models are tested in accordance with EN ISO 20347:2022.