Description
S548 Hi-Vis Ultrasonic Heated Tunnel Jacket – Yellow/Black
Stay warm, visible, and protected in the S548 Hi-Vis Ultrasonic Heated Tunnel Jacket, exclusively available at TECHACS Safety Solutions, your Authorized Portwest Dealer. Designed for superior insulation, comfort, and visibility, this innovative jacket is built for demanding environments.
Key Features
- Heated Panels: Carbon fiber panels with three adjustable heat settings (3-10 hours) and a rechargeable battery for customizable warmth.
- Water Resistance: Made with PFAS-free Texpel™ Splash Eco fabric and heat-sealed seams for exceptional protection against water and wind.
- High Visibility: Complies with EN ISO 20471 Class 3 (after 25 washes) and GO/RT 3279 for the rail industry.
- Practical Design: Elasticated cuffs, drawcord adjustable hem, detachable hood, chin guard, and storm flap for a secure and comfortable fit.
- Ample Storage: Three pockets, including secure internal and side zippered pockets, for convenient storage.
- Durable and Protective: Premium stain-resistant finish repels oil, water, and grime, while contrast panels protect against dirt.
Material Composition
- Shell Fabric: 100% Polyester Pongee Ripstop with TPU membrane (5oz).

- Lining Fabric: 100% Polyester Taffeta (1.5oz).
- Filling Fabric: 100% Polyester (7.5oz).
Certified Safety Standards
- EN ISO 20471 Class 3
- EN 13758 (UPF 40+)
- GO/RT 3279 (rail industry compliance)
This jacket combines innovative technology with superior protection, making it an excellent choice for workers in construction, rail, and other high-visibility industries.
Order now at TECHACS Safety Solutions!
Portwest S548 Hi Vis Ultrasonic Heated Tunnel Jacket: The Ultimate Winter Safety Workwear Solution
When temperatures drop and visibility conditions worsen, workers in construction, transportation, and outdoor industries face dual challenges: staying warm while remaining visible. The Portwest S548 Hi Vis Ultrasonic Heated Tunnel Jacket addresses both concerns with innovative heated technology and compliance with the highest safety standards. As an authorized Portwest distributor, TECHACS Safety Solutions provides this cutting-edge workwear that combines thermal comfort with EN ISO 20471 Class 3 high visibility protection.
Revolutionary Heated Technology Meets Safety Compliance
The S548 heated tunnel jacket represents a significant advancement in protective workwear technology. Unlike traditional insulated jackets that rely solely on passive insulation, this jacket incorporates carbon fiber heated panels embedded directly into the padded construction. These heating elements deliver consistent warmth across critical body areas, ensuring workers maintain optimal body temperature even in extreme cold conditions.
The integrated rechargeable battery system powers three adjustable heat settings, providing 3 to 10 hours of continuous warmth depending on the selected temperature level. Workers can easily control the heat output using a convenient button positioned at chest level, allowing quick adjustments without removing gloves or interrupting workflow. This smart heating system transforms how outdoor workers approach cold weather assignments, eliminating the bulk of multiple clothing layers while delivering superior thermal protection.
Superior Visibility Standards for Maximum Safety
High visibility workwear serves as the first line of defense against workplace accidents in low-light conditions. The Portwest S548 Hi Vis Ultrasonic Heated Tunnel Jacket meets EN ISO 20471 Class 3 certification, the highest classification for high visibility garments. This certification ensures the jacket provides maximum conspicuity through the strategic placement of fluorescent yellow background material and reflective tape.
The Class 3 rating requires specific minimum areas of fluorescent and reflective materials, guaranteeing that workers remain visible from all angles and at considerable distances. Whether working near moving vehicles, operating in construction zones, or performing roadside maintenance, the S548 ensures workers can be seen clearly by equipment operators and drivers. The jacket also complies with RIS-3279-TOM Issue 2 standards (in orange colorway), meeting rail industry safety requirements for trackside workers.
Advanced Fabric Technology and Weather Protection
The shell fabric construction utilizes 100% polyester pongee ripstop with a TPU membrane bonded to 100% polyester tricot knit, creating a robust 160g outer layer. This technical fabric combination delivers multiple performance benefits that traditional workwear cannot match.
The ripstop weave pattern prevents tears from spreading, significantly extending garment lifespan even in demanding work environments. The bonded TPU membrane provides excellent water resistance while maintaining breathability, preventing moisture buildup that can lead to discomfort and reduced thermal efficiency. The premium water-resistant finish sheds rain, snow, and sleet, keeping workers dry throughout their shifts.
Additionally, the jacket features a premium stain-resistant finish that repels oil, water, and grime. This characteristic proves invaluable for workers in automotive, industrial, and construction settings where contact with substances is inevitable. The stain resistance maintains the jacket’s professional appearance and high visibility properties, even after repeated exposure to harsh conditions.
Innovative Ultrasonic Baffle Construction
Traditional quilted jackets use stitched baffles that create needle holes, compromising water resistance and allowing insulation to shift over time. The S548 employs heat-sealed ultrasonic baffle technology, eliminating stitching holes entirely. This construction method significantly enhances water resistance while securely containing the insulation material.
The ultrasonic welding process creates permanent bonds between fabric layers without introducing weak points where moisture can penetrate. This innovation represents a substantial improvement over conventional construction methods, ensuring the jacket maintains its thermal and protective properties throughout its service life. The fully lined and padded interior traps body heat effectively, working synergistically with the carbon fiber heating elements to maximize warmth retention.
Practical Design Features for Working Professionals
Beyond its technological innovations, the S548 incorporates numerous practical design elements that enhance usability and comfort during demanding workdays:
Secure Fit and Adjustability: Elasticated cuffs create a snug seal at the wrists, preventing cold air infiltration and heat loss. The drawcord adjustable hem allows workers to customize the fit, accommodating different body types and clothing layers underneath. This adjustability ensures the jacket remains comfortable whether worn over light clothing or heavier base layers.
Enhanced Comfort Features: The chin guard with internal storm flap provides protection against zipper irritation and prevents cold air from entering at the neckline. These thoughtful details demonstrate Portwest’s understanding of real-world working conditions where comfort directly impacts productivity and safety.
Convenient Storage Solutions: Multiple zipped pockets provide secure storage for essential items, tools, and personal belongings. Easy-grip pullers attached to all zippers enable operation with gloved hands, eliminating the frustration of fumbling with small zipper tabs in cold conditions.
Durable Battery System: The heating system features an easy-to-load battery pack designed for durability and repeated charging cycles. The battery management system ensures reliable performance throughout extended work periods, with clear indicators showing remaining charge and current heat setting.
Professional Appearance: Contrast black panels positioned at high-wear areas provide protection against visible dirt accumulation, maintaining a professional appearance throughout the workday. This design consideration reduces the frequency of cleaning while ensuring workers present a professional image on job sites.
Sun Protection and Year-Round Versatility
While primarily designed for cold weather protection, the S548 also meets EN 13758 standards with UPF 40+ sun protection. This certification indicates that the fabric blocks at least 97.5% of UV radiation, protecting skin from harmful sun exposure during outdoor work. This feature extends the jacket’s utility beyond winter months, making it suitable for cool morning shifts that transition into sunny afternoons.
The ability to turn off the heating elements while retaining the jacket’s high visibility, water resistance, and durable construction makes the S548 a versatile investment for year-round outdoor work requirements.
TECHACS Safety Solutions: Your Authorized Portwest Distributor
Selecting the right workwear requires expertise beyond catalog specifications. As an authorized Portwest distributor, TECHACS Safety Solutions provides comprehensive support for businesses seeking compliant, durable safety solutions. Our team understands the regulatory requirements across industries and can guide you toward appropriate high visibility workwear for your specific applications.
We maintain inventory of the Portwest S548 Hi Vis Ultrasonic Heated Tunnel Jacket in sizes from Small through 3XL, ensuring proper fit for your entire workforce. Proper sizing is critical for both comfort and safety compliance, as garments that are too large or small may not provide adequate visibility coverage required by EN ISO 20471 standards.
Contact TECHACS Safety Solutions at 212-202-1952 to discuss your high visibility workwear requirements. Our knowledgeable staff can answer questions about sizing, compliance standards, bulk ordering, and coordination with other Portwest safety products to create comprehensive worker protection programs.
Investment in Worker Safety and Productivity
The Portwest S548 represents more than an equipment purchase—it’s an investment in worker safety, comfort, and productivity. Workers who remain warm and visible perform their duties more effectively, with reduced risk of cold-related health issues and visibility-related accidents. The heated technology eliminates the need for multiple bulky layers, improving mobility and reducing fatigue throughout shifts.
From a total cost perspective, the S548’s durable construction, stain resistance, and advanced fabric technology provide excellent longevity, reducing replacement frequency compared to conventional workwear. The premium materials and construction justify the investment through extended service life and superior performance.
Conclusion
The Portwest S548 Hi Vis Ultrasonic Heated Tunnel Jacket sets a new standard for cold weather safety workwear. By combining carbon fiber heating technology with EN ISO 20471 Class 3 high visibility compliance, premium water-resistant fabrics, and practical design features, this jacket delivers comprehensive protection for workers facing challenging environmental conditions.
Whether your team works in construction, utilities, transportation, or any outdoor industry requiring high visibility protection, the S548 provides the thermal comfort and safety compliance necessary for productive, safe operations. Visit techacs.com to explore our complete selection of Portwest jackets and high visibility workwear, or connect with us on LinkedIn for updates on the latest safety solutions.
For immediate assistance with your workwear needs, contact TECHACS Safety Solutions at 212-202-1952. Our authorized Portwest distributor team is ready to help you select the right protective equipment for your workforce.
Frequently Asked Questions (FAQs)
How long does the battery last on the Portwest S548 heated jacket?
The rechargeable battery provides 3 to 10 hours of heat depending on the selected heat setting. Higher heat settings consume more power, while lower settings extend battery life. The battery can be easily recharged between shifts.
What safety standards does the S548 Hi Vis jacket meet?
The jacket meets EN ISO 20471 Class 3 high visibility standards, EN 13758 UPF 40+ sun protection, and RIS-3279-TOM Issue 2 rail industry standards in the orange colorway. These certifications ensure compliance with the most stringent safety requirements.
Can the heated jacket be washed?
Yes, the jacket can be washed following the care instructions provided with the garment. The battery pack should be removed before washing. The stain-resistant finish helps maintain appearance with less frequent washing.
What sizes are available for the Portwest S548?
The S548 is available in sizes Small through 3XL, accommodating a wide range of body types. Proper sizing ensures both comfort and compliance with high visibility coverage requirements.
Is the heated jacket waterproof?
The S548 features premium water-resistant fabric with ultrasonic sealed baffles that provide excellent water resistance. While highly water-resistant, it is designed for wet weather protection rather than full submersion.
Where can I purchase the Portwest S548 heated jacket?
TECHACS Safety Solutions is an authorized Portwest distributor offering the S548 and complete range of Portwest workwear. Contact us at 212-202-1952 or visit techacs.com for ordering information.









