Dunlop Acifort Concrete full safety The only real boot solution for concrete work Optimized compound for improved chemical resistance High density to protect against protruding objects Certified ankle protection for optimum safety SB certified The SB classification is the entry level category with respect to protective features for safety footwear. These features include a protective toecap and a slip resistance of minimal SRA or SRB. The boots are tested and certified in accordance with the EN ISO 20345:2011 standard.