Sievi FastX DFlex Roller S3S lightweight safety shoe

Sievi FastX DFlex Roller S3S - lightweight breathable safety shoe

Sievi FastX DFlex Roller S3S is a new-generation closed S3S safety shoe for professional use. It combines a trainer-like lightweight feel, soft step, breathable microfiber and textile upper, and a grippy rubber TractionPro® friction sole. The model is designed for users who have wanted one safety shoe with lightness, flexibility, breathability, reliable grip and fast BOA® adjustment.

Key features

• A highly practical and widely used S3S safety shoe from the FastX range
• Trainer-like, lightweight and soft wearing feel
• Breathable microfiber and textile upper
• Water-repellent upper supports use in changing work conditions
• BOA® Fit System Li2 enables fast and precise adjustment
• The BOA® Roller dial is positioned on the side of the shoe, helping prevent it from opening under pressure from above
• Sievi DualFlex+® flexible midsole makes the sole lightweight and flexible along its full length
• Sievi TractionPro® friction sole improves grip on different work surfaces
• Aluminium toe cap protects the foot with a lightweight structure
• Composite PS penetration-resistant midsole protects underfoot
• Antistatic and ESD construction
• Wide size range 35-48 suits companies with a limited footwear selection

Applications

FastX DFlex Roller S3S is suitable for general professional use in environments where lightweight, breathable and grippy closed safety footwear is required. The model is well suited for industry, logistics, warehouse work, maintenance, installation work, property maintenance and other mobile tasks where users value a soft step and fast fastening. The wide size range and competitive overall specification make it a practical choice for companies that want to keep their footwear range limited to one or a few dependable models.

Comfort and fit

The extremely lightweight sole, flexible along its full length, consists of the Sievi DualFlex+® flexible midsole, TractionPro® friction outsole and a conductive polyurethane layer that adds stability to the footwear. The BOA® Fit System Li2 mechanism adjusts both forwards and backwards for precise micro-adjustment, making it easy to fine-tune the fit during the working day. The microfiber and textile upper makes the shoe more breathable than a heavier traditional safety shoe.

Safety and standards

The footwear meets the requirements of EN ISO 20345:2022+A1:2024 with marking S3S SR SC FO. S3S means that the footwear includes toe protection, antistatic properties, heel energy absorption, a water-repellent upper and PS-level penetration resistance. SR indicates tested slip resistance, SC refers to additional scuff cap abrasion resistance, and FO means resistance of the outsole to fuel oil.

Technical information

• Product name: Sievi FastX DFlex Roller S3S
• Product number: 54-52546
• Product code 35-38: 54-52546-192-98M
• Product code 39-48: 54-52546-193-98M
• Sizes: 35-48
• Standard: EN ISO 20345:2022+A1:2024 S3S SR SC FO
• Safety class: S3S
• Toe cap: aluminium
• Penetration-resistant midsole: composite PS
• Upper material: microfiber and textile
• Sole material: 3-layer PU/SC/RU
• Fastening: BOA® Fit System Li2
• BOA® lace length: 70 cm
• Features: 3D-dry®, antistatic, DualFlex+®, ESD, heel shock absorption, oil-resistant outsole, TractionPro®, DUAL Comfort, ShieldKnit, water-repellent upper and orthopedic insole

Limitations of use

The product should not be recommended for chemical use, welding, extremely hot conditions, continuous wet use or special electrical protection requirements without separate verification. The product information does not state WR water resistance or HRO heat-resistant outsole marking.

See the manufacturer's website for more information and available certificate PDF files.