Boulder is a superb boot with even more features than ever. Using only the very best selected hides, triple heavy stitching and the famous V12 rivet at the stress point these boots are built to last. This product is unique in the range as it combines anti-static properties with the Goodyear welted construction. All V12 footwear exceeds the requirements of EN ISO 20345:2004. V12 soles are oil and abrasion resistant in accordance with CEN requirements and heat resistant to 300ÂºC for hot contact. All V12s contain a corrosion resistant, flexible steel midsole tested to nail penetration force of >1100N and a 200 Joule Steel Toe Cap, Anti-Static and Water Repellant Upper. Rated S3. Sizes 4-16.