1) Factory 2) OEM / ODM 3) construction safety shoes 4) Goodyear safety footwear 5) EN ISO 20345 Goodyear Welted Construction1. Upper ... 203454. 300°C heat resistant.5. Shock absorbing heel6. construction safety shoesSafety Features: 1. Smash resistant, 2. Punture resistant, 3 ... . Slip resistant, 4. Oil resistant, 5. Acid and alkali resistant, 6. Heat resistant ...