For mechanics, engineers, agricultural workers and tradespeople, coveralls and boilersuits remain some of the most practical garments ever designed. One zip and you're protected from collar to ankle, with no gaps, no untucked shirts and no ruined clothes. This guide covers fabrics, features, specialist types and sizing so you can choose the right one for your team.

What coveralls and boilersuits protect against

Coveralls (also known as boilersuits or overalls) shield your clothing and skin from oil, grease, dust, paint and general workshop grime. Because they cover everything in one piece, there's no gap at the waist for dirt to get in when you bend, kneel or lie under a vehicle.

The terms are used interchangeably in the UK, but some suppliers use overalls for bib-and-brace styles with shoulder straps. These leave the arms free and suit warmer conditions, so check the product description to make sure you're getting the style you want.

Quality versions are made from hardwearing polycotton drill fabric that resists rips and survives frequent industrial washing. Polycotton holds its colour and shape better than pure cotton, while 100% cotton is softer and more breathable but can shrink and fade. Check for reinforced stitching at stress points like knees, elbows, crotch and pockets, as these are where cheaper garments fail first.

Practical features to look for

Practical features make all the difference day to day. Look for:

• A two-way zip for easy access and comfort when sitting or driving.
• An elasticated back for freedom of movement when reaching and bending.
• Multiple tool pockets, including a rule pocket on the leg.
• Concealed stud fronts that won't scratch paintwork, a must for vehicle technicians and bodyshop staff.
• Kneepad pockets for anyone who kneels regularly. Type 2 kneepads under EN 14404 are inserts certified together with a specific garment, so use the inserts the manufacturer specifies.

Specialist coveralls for higher-risk work

Specialist options are available too. Flame-retardant coveralls protect welders and those working near heat sources. Look for EN ISO 11612 for heat and flame, and EN ISO 11611 (Class 1 or 2) for welding. If there's a risk of electrical arc flash, the garment should be tested to IEC 61482-2. Our range of welding clothing and PPE covers compatible kit, and our guide to flame-retardant workwear explains the standards in more detail.

Hi-vis coveralls combine full coverage with EN ISO 20471 visibility. Because they cover the torso, arms and legs, many reach Class 3, but always check the class on the label against your client's or principal contractor's site rules. You'll find more options in our hi-vis workwear.

Food-trade coveralls support hygiene compliance in processing environments, often with press studs instead of buttons and no external pockets above the waist. For short, very messy jobs such as loft work or spraying, disposable coveralls keep your main kit out of harm's way.

Sizing and care

Sizing matters more than people think. A coverall should be roomy enough to wear over normal clothing without restricting movement. If in doubt, size up.

Check chest size and leg length separately, as many ranges come in short, regular and tall fittings. A quick test is to squat and reach overhead: if the fabric pulls across the back or the legs ride up above the boot, go bigger.

Wash coveralls regularly, as built-up oil and grease can stiffen fabric and, on flame-retardant garments, may affect protection. Always follow the manufacturer's care instructions for specialist coveralls, and retire any with burns, holes or worn reflective tape.

Quick answers

What is the difference between coveralls and overalls?

In the UK the words are often used for the same one-piece garment. Some suppliers use overalls to mean bib-and-brace styles with shoulder straps, while coveralls and boilersuits have full sleeves.

Should I size up in coveralls?

Usually, yes, if you plan to wear them over your clothes. Check the chest and leg measurements on the size guide, and make sure you can squat and reach overhead without the fabric pulling.

Are flame-retardant coveralls suitable for welding?

Only if they're certified for it. Look for EN ISO 11611 for welding, alongside EN ISO 11612 for heat and flame, and follow your risk assessment.

Browse our full range of coveralls and overalls in a wide choice of colours and sizes. We can also embroider or print your company logo across the back or chest, so get in touch to discuss what your team needs.