S548 Hi-Vis-Jacket Ultrasonic Heated-Tunnel Winter Jacket

5.00 out of 5
(1 customer review)


Keeps you warm in the harsh winter conditions. 

  • Premium stain resistant finish repels oil, water and grime
  • Premium water resistant fabric
  • Elasticated cuffs
  • Drawcord adjustable hem
  • Battery life of up to 10 hours
  • Micro USB charging cable included
  • Lightweight flexible HiVisTex Pro segmented reflective tape 
  • 4 pockets 


S548 Hi-Vis-Jacket Ultrasonic Heated-Tunnel Winter Jacket

The S548 Hi-Vis-Jacket Ultrasonic Heated-Tunnel Winter Jacket offers the best in high visibility standards and insulation solutions. Carbon fibre heated panels are embedded into this padded jacket to bring extra warmth and comfort to the wearer. The use of innovative heat sealed baffle fabric increases its water resistance. The S548 also has three heat settings controlled by a button at the chest and includes a rechargeable battery that offers 3-10 hours of heat.


Key Features

  • Premium water resistant fabric
  • Heat sealed seams for increased water and wind resistance
  • Battery powered carbon fibre heated panels bring extra warmth to the wearer
  • Battery life of up to 10 hours
  • Elasticated cuffs for a secure fit
  • Drawcord adjustable hem
  • Premium stain resistant finish repels oil, water and grime
  • Chin guard with internal storm flap provides extra comfort
  • Easy to load and durable battery pack
  • Micro USB charging cable included
  • Front zip opening for easy access
  • 2 side zip pockets for secure storage
  • Detachable lined hood
  • Easy grip pullers attached to all zips
  • Fully lined and padded to trap the heat and increase warmth
  • Contrast panels for protection against dirt
  • Lightweight flexible HiVisTex Pro segmented reflective tape for increased visibility
  • 4 pockets for ample storage
  • Certified to EN ISO 20471 after 25x washes
  • CE certified


Shell Fabric : 100% Polyester 4 Layer with a Breathable TPU Membrane 195g
Lining Fabric : 100% Polyester Tafetta 55g
Filling Fabric : 100% Polyester 260g
Contrast Fabric : 100% Polyester Pongee Ripstop with TPU Membrane bonded to 100% Polyester Tricot Knit 150g


  • EN ISO 20471 Class 2 Size S
  • EN ISO 20471 Class 3 Size M+

Remove battery pack before washing. Do not use bleach or acidic detergents.


Portwest X3™

Engineered with exceptional fabric and designs, our premium rainwear collection allows for optimal outdoor performance. Designed with a modern slim cut, each style offers multiple performance enhancing features. The highly waterproof and breathable fabrics used in this collection offer maximum protection against harsh weather conditions.


The following Rainwear collections offer an outstanding choice of designs and colours, suitable for many end users. The best quality fabrics and high technology construction techniques are used throughout, guaranteeing the ultimate in all-weather protection. Tested to withstand the rigours of everyday wear, each garment has been designed and manufactured with care to ensure total satisfaction wear after wear.

High Visibility

Our extensive range of high visibility clothing meets stringent requirements in both design and construction, to ensure compliance with the latest EN ISO 20471 and ANSI standards. Innovative and technical, our high visibility range is ideal for those who will not compromise on style, comfort, protection and performance.

Hi-Vis Jackets

Hi-Vis JacketsHi-vis safety standardsWho needs to wear hi-vis jackets?What do different hi-vis colours mean?

Hi-Vis Jackets

Hi-vis jackets are a must in a variety of industry roles from construction workers, warehouse operators, security guards, police officers and more. People wear them every day (and night), but how do they actually work? Where did they come from? And why are there so many different hi-vis colours?

Hi-vis safety standards

The first thing to look out for is this image that lets you know that it conforms to the BS EN 471 standard – the British Standard for hi-vis clothing

Image of hi-Vis standards

The (X) indicates the conspicuity (quality) class of the garment. This lets you know how visible the hi-vis will be. It will display a number from 1 to 3, Class 3 being the best and offering the highest level of visibility. The (Y) indicates the level of retroflection and can be either 1 or 2, with Class 2 being the most reflective. WP indicates how waterproof the clothing is usually from 2,000mm (the least waterproof) to 15,000 (the most waterproof). UPF indicates the amount of hi-vis protection the hi-vis jacket or garment offers, for example; a 50+ UPF rated fabric will block 98% of UV rays.

These rules apply for all types of hi-vis clothing, from hi-vis trousers and hi-vis jackets to harnesses

Also don’t forget to make sure that your hi-vis has the CE mark. This shows that it meets the European / UK rules on PPE standards.

CE logo in black

Who needs to wear hi-vis jackets?

Security Guards 

Security guards and officers are required to wear hi-vis jackets in a variety of settings ranging from shops, clubs, pubs, airports, and museums to football games, gigs, festivals and events. These settings all have large crowds of people in one place therefore being able to locate a security guard is vital if you are in need of assistance.

The hi-vis jackets allow you to easily see the security guards even from far away. Security personnel are also in need of specialist hi-vis clothing due to often working outside in various weather conditions and often at night, hi-vis jackets that have added protection from the elements are a must to keep staff warm/ cool, comfortable and safe no matter the weather.

Construction workers

Construction workers need hi-vis jackets whilst working on busy construction sites so that they are easy to see and therefore safe from hazards posed by large machines and vehicles such as cranes. As construction sites are fast paced environments a hi-vis jacket is imperative to keep workers safe from harm. Other hi-vis PPE equipment such as hi-vis gloves and helmets are also recommended to offer optimum protection and eradicate the potential of risks.

Warehouse/ factory workers 

Warehouses and factory settings flag up similar risks to construction sites. The hi-vis worn by these workers does not need to be weatherproof as they are working inside, however some factories work at very high or low temperatures, therefore special hi-vis jackets can be effective in these settings. For those working as operatives of forklifts hi-vis helps them to stand out and those working on the floor should also be hi-vis jacket clad to enable them to be easily spotted. A hi-vis jacket is also a must for workers in the delivery areas due to the big trucks and lorries that could be life threatening if a collision were to take place. Any employer who cares about safety will ensure hi-vis for everyone in such places.


As mentioned before two-thirds of accidents with motorbikes and car occur because the driver does not see the bike, therefore when cycling or riding a motorbike hi-vis jackets should be worn in order to be easily seen and avoided by approaching vehicles.

Horse riders 

In the UK countryside people riding horses wear hi-vis to stand out. As horses are generally muted colours like brown black or white it is important for the riders to stand out so the vehicles can spot them from a distance and act accordingly to safely pass the rider and avoid startling the horse. Some horse riders not only wear hi-vis jackets but also equip their horses with hi-vis gear such as fluorescent hi-vis saddles and blankets.


Some pedestrians opt to wear hi-vis jackets for different reasons such as: school walking buses, organized walks, night pedestrians and dog walkers. The reason for the hi-vis jackets is the same as for cyclists – you are at risk from vehicles so should make them aware of your presence if you can, especially at night or during the winter months.

Road and rail workers

As mentioned in the history of hi-vis the rail workers were the first to receive hi-vis jackets in the UK. Since the introduction of hi-vis jackets for the workers on Glasgow’s railways this clothing has become a staple for all working near trains. The travel industry in general is now made up of workers wearing hi-vis jackets to keep them safe and seen from a distance and in dark conditions.


Hi-vis jackets may be the last thing you would associate with the military, however during times of peace hi-vis technology can become a vital garment to help prevent accidents. In aircraft carriers, workshops and more military members don a hi-vis jacket to keep them safe from harm potential.

Emergency Services

Emergency service personnel such as police officers, paramedics, and the fire brigade wear hi-vis jackets so that they can be easily seen by those who are in danger and require their assistance. Hi-vis jackets also allow the emergency services to be spotted if they are pursuing dangerous activities such as chasing a suspect or entering a fire. Due to the nature of their work a lot of time can be spent working outside in various weather conditions, hi-vis jackets are available to buy with added thermal hi-vis or cooling h-vis features keeping them comfortable all day long.

What do different hi-vis colours mean?

The most important thing to remember when it comes to hi-vis jackets and clothing is that its job is to stand-out. This may sound obvious however keeping this in mind will enable you to make the correct colour choices. Hi-vis should not blend into the background, if this happens the person wearing the clothing will be at risk. Lots of factors can determine the optimum hi-vis colour that should be worn most notably location, weather and time.


Location can have a huge effect on which colours stand out – no matter how fluorescent the garment or numbers of reflective strips on the hi-vis jacket. In busy city construction sites, the general background is likely to be grey and muted therefore a yellow hi-vis jacket will stand out clearly and many construction workers opt for this colour. Railway workers are more likely to be working in very different conditions, the workers in the train stations may be able to opt for yellow, but those working on the tracks may be in danger wearing this colour. Due to the green backdrop of the countryside and trees and bushes that run alongside where most train tracks pass through the yellow hi-vis can be lost. Its proximity to green on the colour pallet can cancel yellow out and result in it being more difficult to spot people wearing it at a distance. Orange however is a hi-vis colour that is not regular in the countryside therefore it stands out from further away which is why people working on the railways in the UK are expected to wear orange hi-vis jackets to keep them safe.


Another factor that can affect the colour of hi-vis a person wears is the weather:


Spring sees the trees and flowers sprouting all around and the backdrop can become orangey and green as new life blooms. To stand out against this background pink hi-vis jacket is a great option for pedestrians etc to wear.


Summer is frequented with blue skies and green trees, the sun shines and fields are usually cut which can create yellow background in the summer. Orange is a great hi-vis jacket colour option for these months.


Autumn sees nature becoming brown and the sky becomes darker earlier to stand out against these colours yellow may be the best option of hi-vis jacket.


Winter is the time where the trees become bare, flowers are few and far between and the sky is often clouded and dark meaning that yellow hi-vis jackets are easily spotted. Snow can throw in some issues as it can create a bright glare when reflecting from the sun. In snowy conditions orange or pink hi-vis will help you be seen rather than yellow.


Time is of course a big factor that is most self-explanatory. In the night hi-vis clothing is more effective if it has reflective strips. It is possible to purchase reflective clothing that is not hi-vis however hi-vis jackets are more likely to enable you to be spotted and will reduce the risk of drivers being startled of dazzled by sudden reflective clothing.


Additional information




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1 review for S548 Hi-Vis-Jacket Ultrasonic Heated-Tunnel Winter Jacket

  1. 5 out of 5

    Rebeca Cisse

    Love it

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EN ISO 20471 – High Visibility International standard for high visibility clothing – test methods and requirements for background fabric and retroreflective tape for use in high risk situations.
RIS-3279-TOM ISSUE 1- Railway Industry Standard The Railway Industry Standard sets out the minimum specification for high visibility clothing in the railway industry. The standard refers to orange garments only.
ANSI/ISEA 107 – High Visibility The American National Standard for high visibility safety apparel and headwear. The standard provides a uniform, authoritative guide for the design, performance specifications and use of high visibility and reflective apparel including vests, jackets, bib/coveralls, pants and harnesses.
EN 343 – Protection Against Rain The European Standard that applies to garments worn in adverse weather conditions. It specifies the characteristics of protective clothing against the influence of foul weather, wind and cool above -5°C.