Portwest DX4 Back Support Work Trousers

The First Line of Defence for Your Lower Back

The Portwest DX4 Back Support Work Trousers set themselves apart with a feature no other work trouser in the range offers — an integrated back support system built directly into the waistband. The support reinforces the spine, abdomen, and lower back, providing targeted compression where physical strain is greatest. The adjustable belt lets you dial in the level of support to suit your comfort, and the support can be worn under or over clothing depending on the task. For tradespeople who spend long days lifting, bending, and working in awkward positions, the DX4 addresses the root cause of one of the most common workplace complaints.

Ergonomic Design with 4-Way Stretch

Every element of the DX4 is engineered around movement. The Titanmill Pro Stretch shell fabric — 93% polyester with 7% elastane at 270g — delivers 4-way stretch across the entire garment, giving you a full range of motion in every working position. A high-rise back waistband with side elastication keeps coverage consistent whether you're reaching overhead or crouching at ground level. The stretch crotch gusset reduces stress at the seam most prone to failure, while pre-bent knees follow the natural shape of your leg for increased freedom of movement without excess fabric bunching behind the knee.

9 Pockets and Dual Hammer Loops

The DX4 provides practical, well-placed storage across 9 pockets. Two deep side pockets handle daily essentials, while two zipped thigh pockets secure your phone, wallet, or site pass. Two additional thigh pockets and two back pockets offer further carrying capacity, and dedicated rule, pen, and spanner pockets keep specialist tools exactly where you need them. Dual hammer loops give you flexible tool carrying on both sides — a useful detail for workers who switch between tasks frequently.

CorePro Reinforcement Where It Counts

High-wear areas including the hem and pockets are reinforced with CorePro fabric — an 87% nylon, 13% elastane blend that adds abrasion resistance without adding stiffness. This targeted reinforcement protects the zones that take the most punishment during daily use, significantly extending the working life of the trousers compared to standard workwear construction. Triple-stitched seams throughout the garment add a further layer of structural durability at every join.

Built-In Ventilation for Temperature Control

The DX4 tackles overheating with a multi-layered approach to airflow. Laser-cut ventilation holes and dedicated air vents work alongside internal ventilation channels to move warm air away from the body, keeping you cooler during intense physical work or in warm conditions. For tradespeople working indoors in heated environments or outdoors through the summer, this active ventilation system makes a noticeable difference across a full shift.

Visibility and Safety Details

Reflective trim detailing increases your visibility in low-light conditions, adding a passive safety feature for early morning starts, late finishes, or work near moving vehicles. Easy-grip zip pullers on all zipped pockets allow quick, gloved access — a small but practical detail that reduces frustration on site.

Knee Pad Pockets with Certified Protection

Top-loading, pre-bent adjustable knee pad pockets accept pads quickly without the need to remove the trousers. When used with the Portwest S156 knee pads, the DX408 meets EN 14404:2004+A1:2010 Type 2 Level 0 for certified knee protection during kneeling tasks. The pre-bent design reduces bulk and improves comfort for workers who spend extended periods on their knees.

Slim Fit, CE Certified

The slim-fit silhouette delivers a modern, professional look that doesn't compromise on function. CE certified for compliance, the DX4 Back Support Work Trousers are built for electricians, plumbers, carpenters, and any tradesperson who values both their back and their performance on site.

How does the back support work on the Portwest DX4 trousers? The DX4 features an integrated back support system built into the waistband that reinforces the spine, abdomen, and lower back. The belt is adjustable for comfort and can be worn under or over clothing, providing targeted compression during physically demanding tasks.

How many pockets do the Portwest DX4 back support trousers have? The DX4 trousers feature 9 pockets including two side pockets, two zipped thigh pockets, two additional thigh pockets, two back pockets, and dedicated rule, pen, and spanner pockets. Dual hammer loops provide further tool carrying options.

Are the Portwest DX4 trousers ventilated? Yes. The DX4 uses laser-cut ventilation holes, air vents, and internal ventilation channels to promote airflow and regulate body temperature during physical work.

What knee pads fit the Portwest DX4 trousers? The top-loading knee pad pockets are designed for use with Portwest S156 knee pads. This combination is certified to EN 14404:2004+A1:2010 Type 2 Level 0 for knee protection during kneeling tasks.

Are the Portwest DX4 trousers suitable for people with back problems? The integrated back support is designed to reinforce the spine, abdomen, and lower back during physical work. While not a medical device, the support provides targeted compression that may help reduce strain during lifting, bending, and working in awkward positions. Consult a healthcare professional for specific back conditions.

What is CorePro reinforcement? CorePro is a durable 87% nylon, 13% elastane fabric used to reinforce high-wear areas such as the hem and pockets. It adds abrasion resistance without stiffness, extending the working life of the trousers.