The Flame Retardant Pants are designed for use in environments with static electricity, sparks or similar hazards, providing comfort, flexibility and durability. The main fabric is certified to ASTM F1959 (8.4 cal/cm2) and EN ISO 11611/11612 (Class 1, A1, A2, B1, C1, F1) standards, with permanent flame retardant and anti-static features.

$8,095.00 TWD $10,258.00

Each pair of pants includes a set of knee pads. 每條褲子都附帶一對護膝
Estimated Delivery: September 2024/ 9月2024年出貨
Discount for verification workers does not apply to this pre-order 驗證工人優惠不適用此預售

5 in stock
Please read the Terms & Conditions agreement before placing your order. 

Fabric:45% Modacrylic/ 35% Cotton/ 18% Polyamide 66/ 2% AS, 43% OPF/ 32% FR Rayon/ 23% Para-aramid/ 2% AS

3M Industrial Reflective

Hardwares: YKK™ zips / Customized Extra Safe Slide Buttons

Key Functions

Pants Weight (587 gsm) 

ASTM F1959 8.4 cal / cm2

EN ISO 11611/EN ISO 11612 (Class 1, A1, A2, B1, C1, F1)

ASTM F1930 < 10%

2x Adjustable Elastic Waistband 

Pen & Tool Pockets 

Water Repellent Zipped 3D Pockets 

4.0 Kneepads

Ergonomically Shaped

4.0 Ultralight Flame Retardants Pants

Functional Pockets


YKK 3D Zipper Pocket (right side).

Tool Slot Pocket (left side).

➤ Retained Features


Flame Retardant Test

With the 4.0 flame-resistant variant, we used flame-resistant fabric compliant with EN13773 standards. This provides protection for individuals working in environments where sparks are generated by reducing the chance of sparks igniting on the fabric, providing greater protection.

35% Lighter Than Traditional Denim Pants


4.0 Key Improvements


Knee Pads with 2x Cushioning

The previous 3.0 Knee Pads showed slight flattening after heavy daily usage. In order to provide more durability, the thickness of the 4.0 Knee Pads have been doubled to 10mm, providing longer lasting flexibility and protection.

The New 4.0 Knee Pads

➤ 2x Durability

➤ 2x Cushioning

➤ Just as lightweight and flexible

➤ Lighter than an AA battery

Who has been wearing the Flame Retardant 3.0?

Thank you so much for all your comments and feedback! The new 4.0 was made possible by workers like you from all different trades who wore our 3.0 over this last year.


Daniela Rubino

➤ Occupation: Welders, Metal fabrication experts.

➤ Location: United Kingdom.

Lauren Wilson

➤ Occupation: Welders, Metal fabrication experts.

➤ Location: United Kingdom.

➤ Measurements Guide