BIRKENSTOCK Qs 400 QS 400 Unisex Work Safety Shoes Natural 。Birkenstock QS 400 NL slip-on safety shoes provide a sleek, professional look without sacrificing protection. Crafted from premium black natural leather, these shoes feature a water-resistant upper and a slip-resistant nitrile rubber outsole that is also oil and petrol resistant. The design includes a steel toe cap for impact protection and an antistatic construction. Elastic side gores ensure a comfortable, flexible fit, while the removable anatomically shaped cork-microfiber footbed offers the signature Birkenstock support for long days on your feet. Made in Portugal, these functional work shoes are ideal for demanding environments that require EN ISO 20345:2011 S3 SRC certification.