Delta Plus COBRA4 S3 SRC – High-Cut Welding Safety Boots EN ISO 20349-2 - Black

Delta Plus COBRA4 S3 SRC – Professional Welding Safety Boots

The Delta Plus COBRA4 S3 SRC Welding Safety Boots are high-cut protective footwear specifically designed for welding operations and demanding industrial working environments.

Combining durable leather construction, stainless steel toe protection, a steel penetration-resistant insert and a heat-resistant outsole, these boots provide multiple protective features for professionals exposed to mechanical and thermal workplace hazards.

Certified Welding Protection – EN ISO 20349-2:2017 WG

The COBRA4 welding boots comply with EN ISO 20349-2:2017 WG, a standard addressing protective footwear for welding and related processes.

Their high-cut design, hook-and-loop fastening and para-aramid reinforced stitching provide a practical construction for professional welding applications.

S3 Safety Protection with Steel Toe Cap 

The Delta Plus COBRA4 features a stainless steel safety toe cap designed to protect against impact and compression hazards.

A stainless steel penetration-resistant insert helps protect the underside of the foot from sharp objects.

The EN ISO 20345:2011 S3 classification includes essential protective requirements such as toe protection, antistatic properties, heel energy absorption, penetration resistance and water penetration and absorption resistance of the upper.

HRO Heat-Resistant Outsole – Up to 300°C

 The outsole combines injected polyurethane (PU) and nitrile rubber.

The HRO marking indicates resistance of the outsole to contact heat under the applicable 300°C test conditions.

Additional protective markings include HI for heat insulation and FO for resistance of the outsole to fuel oil.

The HRO rating applies to the tested outsole performance and does not mean the complete boot is suitable for continuous exposure to 300°C.

SRC Slip Resistance

The COBRA4 features an SRC slip-resistance classification under EN ISO 20345:2011.

This indicates that the footwear has passed specified slip-resistance tests on ceramic and steel test surfaces under defined laboratory conditions.

The outsole also incorporates a ladder-grip design to help improve footing during ladder work.

Durable Water-Resistant Leather Upper

 The upper is manufactured from treated leather, with reinforced para-aramid stitching for durability.

Its water-resistant construction helps reduce water penetration through the upper material, while the polyester textile lining provides additional wearing comfort.

Comfortable and Removable Footbed

The COBRA4 includes a removable, breathable, pre-shaped EVA and polyamide footbed.

Heel energy absorption helps reduce impact transmitted during walking, while the removable insole makes cleaning and routine maintenance easier.

Professional Applications

The Delta Plus COBRA4 S3 SRC may be suitable for:

• Welding and metal fabrication.
• Industrial manufacturing and maintenance.
• Construction and civil engineering.
• Automotive workshops and mechanical repair.
• Energy and utility services.
• Mining and heavy-duty technical operations.
• Waste management and water treatment facilities.

Final footwear selection must follow the workplace risk assessment and applicable PPE requirements.

Why Choose the Delta Plus COBRA4 S3 SRC?

The Delta Plus COBRA4 combines S3 safety protection, specialist welding certification, HRO heat-resistant outsole performance, steel toe protection and a penetration-resistant steel insert.

Its durable leather upper, hook-and-loop fastening and removable breathable footbed make it a practical option for professional welders and industrial workers seeking certified protective footwear.

Technical Specifications

• Brand Delta Plus
• Model COBRA4 S3 SRC
• Product Type High-Cut Welding Safety Boots
• Product Category Safety Footwear / PPE
• Safety Rating S3
• Upper Material Treated, dyed water-resistant croupon leather
• Lining Material Polyester textile
• Insole Material EVA and Polyamide
• Footbed Features Removable, breathable, pre-shaped
• Outsole Material Polyurethane (PU) and nitrile rubber
• Sole Technology Injection moulded
• Outsole Construction Dual-density
• Safety Toe Cap Stainless steel
• Penetration-Resistant Insert Stainless steel
• Reinforced Stitching Para-aramid
• Closure Hook-and-loop (Velcro)
• Contact Heat Resistance HRO – tested at 300°C
• Heat Insulation HI
• Slip Resistance SRC
• Antistatic Properties A
• Heel Energy Absorption E
• Fuel Oil Resistance FO
• Upper Water Penetration and Absorption Resistance WRU
• Additional Outsole Feature Ladder-grip design
• Weight 726 g per shoe
• Safety Standard  EN ISO 20345:2011
• Welding Standard  EN ISO 20349-2:2017 WG
• PPE Category III