Feature:1. This rubber boot is foot protection equipment for firefighters and rescue workers to enter dangerous places.2. The bottom of the rubber boots is embedded with steel plate, which is waterproof and puncture-proof, and also has basic heat insulation and insulation functions.3. With anti-acid-base, anti-voltage, puncture-proof, fire-retardant and other properties.4. It can be used in mining, forest, glassware and other enterprises to pierce special labor protection shoes.5. Made of flame retardant rubber material, soft, wear-resistant and non-deformable.Specification:Condition: 100% Brand NewItem Type: Firefighter Boots Material: Flame Retardant Rubber Color: As Picture ShownOptional Size: 39, 40, 41, 42, 43, 44, 45Stretch Performance of the Upper: The elongation at break of the rubber fence is 480% and the outsole is at least 380%Puncture Resistance of the Sole: Puncture force 1100NElectrical Insulation Performance: Breakdown voltage 5000VAnti-Smashing Performance: After a high impact of 23kg / 50.7lb weight from 300mm / 11.8in, the height of the gaps in the boots is 15mm / 0.6inInsulation Performance of Shoe Sole: Heating for 30min, inner surface temperature rise 22Heat Radiation Resistance: Heat flux 10kv / radiation for 1min, internal surface temperature rise 22 Abrasion Resistance of the Sole of the Boot: The abrasion reduction is 0.8cm3 / 1.61kmTearing Strength: Rubber surface fence 14.7Mpa, outer layer 10.78MpaTear Strength: 60N / mmSlip Resistance: Such as slip angle 15Oil Resistance: After the oil resistance test, the volume change is within the range of 2% - + 10%Acid and Alkali Resistance: After acid resistance test, tear strength: 40N / mm, Weight change: 2%.Package List:1 x Pair of Firefighter Boots Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.