The Builder’s Guide To Hi Vis Workwear: What You Actually Need On Site

Right, so you've turned up on your first day at a new site and the foreman's given you the look. You know the one. The "where's your hi vis, mate" look. Or maybe you've been getting away with a knackered old waistcoat that's gone more grey than yellow, and the site manager has finally said something. Either way, you're here because you need to sort your hi vis out properly, and you'd quite like to not waste money doing it.

Here's the thing nobody explains clearly: hi vis isn't one thing you buy once. It's a system that changes with the weather, the site rules and what you're actually doing all day. Let me walk you through what you genuinely need, so you can kit yourself out without buying a load of stuff that lives in the van forever.

First, understand the class system (it's simpler than it sounds)

You'll see "Class 1", "Class 2" and "Class 3" plastered everywhere. In plain English: it's about how much reflective and fluorescent material the garment has, and therefore how visible you are. Class 3 is the most visible - full sleeves, loads of coverage - and it's what most roadside and busy plant sites will insist on. Class 2 is your mid-level, fine for plenty of general sites. Class 1 is the lightweight stuff, usually trousers or a summer t-shirt worn as part of a bigger combo.

The mistake people make is buying a cheap Class 2 waistcoat and assuming it covers them everywhere. Check your site's rules first. If they say Class 3, a waistcoat won't cut it and you'll be sent to the welfare cabin to sit it out.

Just need to pass the gate without spending much

If your site only requires a basic hi vis top layer and you're not near traffic, don't overthink it. A simple waistcoat does the job and costs about the same as a meal deal. Chuck one in every bag you own so you're never caught short.

This Scan waistcoat is the definition of cheap and cheerful - the one you keep spare for visitors, labourers, or the day you leave your good jacket at home. It's not going to survive a British winter as your only layer, but as a "get me through the gate" option it's unbeatable value. Buy two.

If you want something that clips over your jacket without flapping about, the band-and-brace style vest is a smarter buy - it sits neatly and won't billow out when the wind picks up.

The MeshAir version breathes properly too, which matters more than you'd think when you're humping materials about in July. For the money, it's a no-brainer to keep one in the toolbag.

Working near roads or plant - go Class 3, no arguments

The moment vehicles or moving plant are involved, visibility stops being box-ticking and starts being the thing that keeps you alive. You want full sleeves and proper Class 3 coverage. This is not where you save a fiver.

This Oxford Weave traffic jacket is the workhorse I'd point most people towards. 300D fabric means it can actually take a beating on site rather than pilling to bits after a fortnight, and it hits Class 3 without costing silly money. The fact it goes all the way up to 7XL is genuinely useful too - proper sizing for real builders, not just the mannequin in the catalogue.

If you want a bit more from your jacket - like being able to zip out a layer when the weather turns - the 2-in-1 versions earn their keep across the year rather than sitting in a cupboard nine months of the year.

A 2-in-1 like this Oxford Weave is the sensible middle ground: full waterproof shell for the wet, plus an inner you can wear on its own on milder days. One purchase, two seasons covered. If you only buy one proper jacket, make it something like this.

The rain is going to win eventually - be ready

British sites and British weather have a special relationship, and it's a miserable one. A "showerproof" jacket will let you down the second you're stood in horizontal drizzle for an hour. If you're outside all day, you want genuinely waterproof, not just water-resistant.

The Portwest WX2 Eco is a proper waterproof that doesn't feel like wearing a bin bag. Breathability is the key thing here - cheap waterproofs trap sweat until you're wet from the inside anyway, which defeats the point entirely. This one lets your body breathe while keeping the weather out, and the eco fabric is a nice bonus if that matters to you. Pair it with waterproof over-trousers and you're genuinely sorted for a grim week.

Welding, hot works or electrical - you need flame resistant

This is the bit people get badly wrong. Standard hi vis will melt, and molten fabric against skin is exactly as bad as it sounds. If you're anywhere near sparks, arcs or hot works, standard kit isn't just inadequate, it's dangerous. You need FR-rated gear, and yes, it costs more for good reason.

This BizFlame Class 3 jacket brings together flame resistance, anti-static and full Class 3 visibility in one garment - which is precisely what you want when you're juggling multiple hazards. It's an investment, but this is the category where cutting corners is genuinely reckless. If your work involves fire risk, buy the right thing and buy it once.

Hands, head and the bits people forget

You've sorted the jacket and forgotten your hands. Classic. Gloves are where a lot of injuries actually happen, and cut-resistant hi vis gloves cost peanuts compared to a trip to A&E.

These Milwaukee cut level 3 gloves are my pick for general site work - enough cut protection for handling sharp materials, dipped grip so you can actually hold tools, and hi vis yellow so a lost glove doesn't vanish into the mud. Milwaukee know what they're doing with gloves, and at this price there's no excuse for bare hands. Match the cut level to your task: level 5 for glass and metal handling, level 2 for lighter jobs.

For colder months, a hi vis beanie under your hard hat keeps your head warm without compromising visibility, and it's the kind of cheap add-on that makes a genuinely miserable January morning bearable.

Your quick buying checklist

• Check the site's required class first. Class 3 for roads and plant, Class 2 for general work, and don't assume a waistcoat covers you everywhere.
• Buy one good jacket, not three mediocre ones. A 2-in-1 or waterproof Class 3 will serve you across seasons.
• Keep a cheap spare waistcoat in every bag so you're never turned away at the gate.
• Match FR gear to fire risk. Hot works, welding or electrical means flame-resistant, no compromise.
• Don't forget gloves and a hat. Cheap, easily lost, and the bits that actually keep you comfortable and safe.
• 300D fabric lasts. If you're on site daily, pay the little bit extra for durability.

FAQ

What do I actually need on site for hi vis workwear as a builder?

At minimum, a hi vis top layer that meets your site's required class - usually Class 2 or Class 3. Beyond that, most builders want one good waterproof jacket, a spare waistcoat, and hi vis gloves. If you do hot works, add flame-resistant kit.

What's the difference between Class 2 and Class 3 hi vis?

Class 3 has more reflective and fluorescent material, including full sleeves, making you visible from further away. It's typically required near traffic and moving plant. Class 2 offers less coverage and suits general site work where high-speed vehicles aren't a factor.

Is a hi vis waistcoat enough on a building site?

Sometimes, but not always. On many general sites a compliant waistcoat is fine, but roadside or plant-heavy sites usually demand Class 3 with sleeves. Always check the site rules before you rely on a waistcoat alone.

Do I need flame-resistant hi vis?

Only if your work involves fire risk - welding, hot works, electrical or arc hazards. Standard hi vis can melt onto skin, so FR-rated gear is essential in those settings. For everyday building with no fire risk, standard hi vis is fine.

Ready to sort your kit properly? Have a browse through the full range of workwear and clothing and grab everything you need in one go - your foreman will stop giving you that look.