Dr Martens S1 P safety Boot. Rubber/PU Sole. Lace-Up Boot with D-Ring and Speed Hook providing excellent fitment. Padded Collar and Tongue. Pull-On Tab. Antistatic and Energy Absorbing Heel. Resistant to high heat Upto 300°. S1-P-HRO-SRC. Conforms with ISO20345 Safety Standards. Lining Material: Textile. Outer Material: Leather. Sole Material: Rubber. Fastening: Lace-Up. Safety Category Marking: S1-P-HRO-SRC. : Toe Protection to 200 Joules Impact. : Antistatic and Energy Absorbing Heel. : Penetration Resistant Midsole to 1100 Newtons. : Sole Resistant To High Heat up to 300°C. : Tested on a Ceramic Tile Contamination with a Dilute Soap Solution. : Tested on smooth Steel Contamination with Glycerol.