Safety Shoes SJ FLUX S3S MID 45 – Metal-Free Nano Carbon Toe Cap, Puncture-Resistant, HRO Outsole, Black/Grey

For professionals who demand uncompromising protection without the weight of steel, the FLUX S3S MID 45 redefines safety footwear. Its nano carbon toe cap and puncture-resistant textile midsole deliver certified S3S protection while keeping the shoe remarkably light and metal-free—ideal for high-security environments and long shifts. The water-repellent mesh upper with TPU overlays offers breathable durability, and the HRO-rated outsole withstands contact heat up to 300°C, making this boot a versatile choice across construction, logistics, and industrial maintenance.

Highlights

• EN ISO 20345:2022 S3S SR FO HRO certified – highest slip resistance (SR), fuel/oil resistant outsole, heat resistant to 300°C
• Metal-free construction: nano carbon toe cap and puncture-resistant textile midsole – ideal for security checkpoints
• ESD protection and antistatic properties for safe use in electronics and explosive atmospheres
• Water-repellent mesh + TPU upper with 3D mesh lining for breathability and quick drying
• Removable SJ foam footbed for customizable comfort and easy replacement
• PU/Rubber sole with energy absorption in heel region (E) reduces fatigue during long shifts

In daily use

Step into the FLUX S3S MID 45 and feel the difference of a shoe built for movement. The lace-up closure ensures a secure fit, while the 3D mesh lining wicks moisture to keep feet dry in warm conditions. The lightweight nano carbon toe cap offers the same impact protection as steel but without the cold or weight, allowing you to stay agile throughout the day. Whether you're navigating a busy warehouse or working on uneven terrain, the SR-rated outsole provides reliable grip on wet and slippery surfaces, and the fuel/oil resistance keeps the sole intact in demanding environments.

Full specifications

• Safety Standard: EN ISO 20345:2022
• Protection Class: S3S SR FO HRO
• Size: EU 45
• Toe Cap Material: Nano Carbon (Non-Metallic)
• Midsole Material: Puncture Resistant Textile (Non-Metallic)
• Upper Material: Mesh + TPU
• Lining Material: 3D Mesh
• Sole Material: PU/Rubber
• Slip Resistance: SR (Highest Level)
• Antistatic Properties: Yes
• Energy Absorption: Heel Region (E)
• Water Resistance: Water Repellent Upper (WRU)
• Heat Resistance: Outsole HRO (up to 300°C)
• Fuel Oil Resistance: Yes (FO)
• Metal-Free: Yes
• ESD Protection: Yes
• Insole Type: SJ Foam Footbed (Removable)
• Closure Type: Laces
• Color: Black/Grey
• Gender: Unisex

Final note

The FLUX S3S MID 45 combines advanced protection with all-day comfort, making it a smart investment for safety-conscious professionals who refuse to compromise on performance.