Caterpillar Gravel ULTRADUTY Black Goodyear Welted S3 Safety Boot with T1200 SRX Rubber Outsole, Midsole and SRC Slip Resistance SRC - Outsole Slip Resistance BS EN ISO : 20345:2011/ CLAUSE NO-5.3.5.2; Tested on Ceramic Tile/Sodium Lauryl - Heel part 0.28