Introducing the ULTRALIGHT 4.0, our upgraded workwear pants designed for hot and humid conditions. With improved durability and functionality, it offers exceptional lightness and breathability. Perfect for heavy-duty work and outdoor activities, on or off-site.
$7,144.00 TWD $8,930.00

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
30% off discount for verification workers does not apply to this pre-order 驗證工人優惠不適用此預售

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

Fabric: 90% Nylon 10% Spandex
100% CorduraⓇ 500D Nylon
85% Ripstop Nylon 15% Spandex

3M Industrial Reflective

Hardwares: YKK™ zips / Customized Extra Safe Slide Buttons

Key Functions

Ultralight (Weight 450 gsm)

Upgraded Anti-Abrasion & Anti-Snagging Fabric

Moisture Wicking Body 

4-Way Stretch Elastic Crotch 

2x Adjustable Elastic Waistband 

Pen & Tool Pockets 

Water Repellent Zipped 3D Pockets 

4.0 Kneepads

Ergonomically Shaped

Zipped Water Repellent Kneepads Pockets

ULTRALIGHT 4.0: New and Improved. The Best Choice For Hot & Humid Temperatures.

Thanks to the invaluable feedback and testing of our customers from all manners of trades, we’ve been able to harness the data from your work and make significant improvements upon the previous ULTRALIGHT 3.0 design.

Functional Pockets


YKK 3D Zipper Pocket (right side).

Tool Slot Pocket (left side).

Products Comparison

3.0 VS 4.0 Ultralight

➤ Retained Features


Cordura 500D

For the knee area and both side pockets, we use high-density, abrasion-resistant, and water-repellent Cordura 500 fabric.

Stretchy Crotch

The crotch area is made of nylon-blended elastic ripstop fabric with a 3D cut, providing a high degree of flexibility and unrestricted leg movement without feeling constrained.

Adjustable Waist & Legs

The Waistband and Leg Cuffs are Adjustable allowing users to adjust the width and tightness of the waistband and leg cuffs according to their needs, with a maximum adjustment width of 8cm. This prevents the pants from sagging from the weight of tools or other carried items.

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

3.0 VS 4.0 Main Shell Fabric Anti-Abrasion Test

To enhance the fabric's durability and snagging issues, we selected a denser fabric with stronger fibers. We conducted comparative anti-abrasion tests between the 3.0 main fabric (LEFT) and the new 4.0 fabric (RIGHT) by applying drills with sandpaper attachments to each fabric. The fabrics were subjected to approximately 1500 rotations of friction (1 minute).

Upgraded Anti-Abrasion & Anti-Snagging Shell Fabric

The test results showed that the 4.0 main fabric did not show any pills, holes or loose threads after the drill and sandpaper attachments were applied, indicating increased abrasion resistance and durability compared to the 3.0.

➤ 4.0 Ultralight Pants Line Up

Who has been wearing the Ultralight 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.


Wei Hao & Guei Sian Song

➤ Occupation: Wall refinishing technician.

➤ Location: Taiwan.

Boris Chan

➤ Occupation: Steel Fixer

➤ Location: Hong Kong.

Manto Lam

➤ Occupation: Tree climber. 

➤ Location: Hong Kong.

Daniela Rubino & Lauren Wilson

➤ Occupation: Welders, Metal fabrication experts.

➤ Location: United Kingdom.

➤ Measurements Guide