Portwest DX4 Hi-Vis Class 1 Winter Bib and Brace DX437 – Premium Stretch Insulated Workwear with Waterproof Protection

Introducing the Portwest DX4 Hi-Vis Class 1 Winter Bib and Brace DX437 – the ultimate combination of flexibility, warmth, and visibility for demanding winter work environments. Part of Portwest's revolutionary DX4 collection, this premium bib and brace utilises cutting-edge 4-way stretch fabric technology combined with InsulatexPro thermal insulation to deliver unparalleled comfort and protection throughout the coldest months.

Designed for professionals who refuse to compromise on performance, this winter bib features EN ISO 20471 Class 1 hi-vis certification with HiVisTex Pro segmented reflective tape for enhanced visibility in low-light conditions. The waterproof construction with taped seams ensures complete protection from rain and snow, while the ergonomic design with detachable bib offers exceptional versatility. Available now from Hall-Fast with fast UK delivery and competitive trade pricing.

Key Features

• DX4 4-Way Dynamic Stretch Fabric: Premium 300D Oxford stretch polyester with mechanical stretch properties provides exceptional freedom of movement for bending, kneeling, and climbing
• InsulatexPro Thermal Insulation: Advanced lightweight padding delivers superior warmth without bulk, maintaining core body temperature in cold conditions while preserving agility
• EN ISO 20471 Class 1 Hi-Vis: Certified high visibility with HiVisTex Pro heat-applied segmented reflective tape for enhanced recognition in low-light and night-time conditions
• Waterproof Protection: Premium waterproof and breathable fabric with fully taped seams prevents water penetration while allowing moisture vapour to escape
• Detachable Bib and Braces: Zip-off function at the back allows complete removal of the bib, converting to standard winter trousers for added versatility
• Pre-Bent Kneepad Pockets: Top-loading adjustable two-tier kneepad pockets with ergonomic pre-bent design for optimal comfort during kneeling tasks
• Multiple Secure Pockets: Comprehensive storage including front cargo pockets, multi-functional zip thigh pockets, rule pocket, phone pocket, and hammer loop
• Adjustable Shoulder Straps: Fully adjustable padded braces with quick-release buckles for a customised, comfortable fit throughout long shifts
• Side Elastic Waist: Elasticated waistband provides ultimate wearer comfort and secure fit during active movement
• Adjustable Hem Length: Regular to long leg adjustment ensures perfect fit regardless of height, with zipped ankles for easy fitting over work boots
• Navy Contrast Panels: Strategic contrast panels on high-wear areas hide dirt and maintain a professional appearance throughout demanding shifts

Technical Specifications

Benefits for Workers

• Superior Full-Body Protection: The bib design extends protection up to the chest, eliminating gaps at the waist where cold air and water can penetrate – essential for outdoor winter work
• Unrestricted Movement: DX4's 4-way dynamic stretch fabric moves with your body, eliminating the stiff, restrictive feel of traditional winter bibs and reducing fatigue during physical tasks
• Lightweight Warmth: InsulatexPro technology provides exceptional thermal insulation without the bulk of conventional padding, maintaining agility while keeping you warm in freezing temperatures
• Versatile Design: Detachable bib function allows quick conversion to standard trousers when conditions change or when full bib protection isn't required
• Enhanced Visibility & Safety: EN ISO 20471 Class 1 certification with segmented reflective tape ensures you remain visible on roadsides, construction sites, and other hazardous environments
• Professional Appearance: Contemporary DX4 styling with contrast panels maintains a smart, modern look that represents your company professionally

Ideal Applications

The Portwest DX4 Hi-Vis Class 1 Winter Bib and Brace DX437 is ideal for:

• Construction and building sites
• Highways and road maintenance
• Utilities and infrastructure work
• Plant and machinery operation
• Warehouse and logistics
• Groundwork and landscaping
• Cold storage and refrigeration environments
• Emergency services and roadside assistance
• Outdoor events, security, and marshalling

Frequently Asked Questions

Why choose a bib and brace over standard winter trousers?

Bib and brace garments provide superior protection by extending coverage up to the chest area. This eliminates the gap between jacket and trousers where cold air, rain, and snow can penetrate. The adjustable braces also prevent the garment from slipping down during active work, ensuring consistent protection. The DX437's detachable bib gives you the best of both worlds – full bib protection when needed, with the option to convert to standard trousers.

What is Class 1 hi-vis and is it sufficient for my work?

EN ISO 20471 Class 1 provides the minimum required area of fluorescent and reflective material for high visibility. It's suitable for lower-risk environments and is commonly used for lower-body garments like trousers and bibs. For complete high visibility protection, pair this Class 1 bib with a Class 2 or Class 3 hi-vis jacket (such as the DX461 or DX430) to achieve full Class 3 coverage. Many workers prefer this combination for flexibility in varying conditions.

Can I remove the bib section completely?

Yes, the DX437 features a zip-off function at the back that allows you to completely remove the bib and braces, converting the garment into standard winter trousers. This adds tremendous versatility – you can wear the full bib for maximum protection in harsh conditions, then quickly convert to trousers when the weather improves or when you move to indoor tasks.

What kneepads are compatible with this bib and brace?

The DX437 features pre-bent top-loading kneepad pockets designed for use with Portwest S156 kneepads. When used together, the combination is certified to EN 14404:2004+A1:2010 Type 2 Level 0 for knee protection. The two-tier pocket design allows two positioning options to suit different working positions and personal preferences.

How should I care for this garment?

Machine wash at 40°C using a mild detergent. Do not use bleach or fabric softener as these can damage the waterproof membrane and reflective tape. Do not tumble dry – drip dry on a line. Do not iron and do not dry clean. Close all zips before washing and ensure kneepad pockets are empty. The hi-vis certification is maintained after 25 industrial washes when following care instructions.

Why Buy from Hall-Fast?

Hall-Fast Industrial Supplies is your trusted partner for quality workwear and safety equipment. As an ISO 9001:2015 certified company, we're committed to delivering exceptional customer service alongside competitive prices on genuine Portwest products.

• Competitive trade pricing on all Portwest DX4 workwear
• Fast and reliable UK delivery
• Expert product advice from our experienced team
• Bulk order discounts available
• Professional embroidery and printing services for corporate branding

Order the Portwest DX4 Hi-Vis Class 1 Winter Bib and Brace DX437 today and experience premium stretch protection for winter work.

Need bulk quantities or corporate branding? Contact our sales team on 01623 645645 or email sales@hall-fast.com for competitive trade pricing and embroidery options.