When temperatures climb, workwear needs to change with them. Overheated workers tire faster, lose concentration and face genuine health risks like heat exhaustion, so summer workwear deserves just as much thought as winter kit. The aim is simple: keep people cool without losing the protection and visibility their job needs.

Choosing breathable summer workwear fabrics

Fabric choice is the starting point. Lightweight polycotton and moisture-wicking polyester keep air moving and draw sweat away from the skin so it can evaporate. Heavy cotton feels fine first thing but stays damp once you start working hard.

Breathable polo shirts and t-shirts are ideal base garments. Lighter colours absorb less heat in direct sun, and mesh panels under the arms or across the back help on the hottest days. Employers should adapt uniform policies seasonally where possible; a small investment in summer-weight garments pays back in comfort and productivity.

Hi-vis doesn't stop in summer

Many polos and t-shirts are available in hi-vis yellow or orange with EN ISO 20471 certification, because visibility requirements don't disappear in June. Hi-vis tops are often cooler than wearing a vest over a standard shirt.

Check the class you need. A vest or short-sleeved top won't usually reach Class 3 on its own, because Class 3 garments need sleeves or full-length trouser legs with retroreflective bands. If your client's or principal contractor's site rules call for Class 3, you may need hi-vis trousers or a long-sleeved top as well. On UK rail, orange hi-vis meeting at least Class 2 is required.

Shorts, sun protection and heat stress

Shorts are increasingly popular on site, and modern work shorts come with the same cargo pockets, holster pockets and hardwearing fabric as their full-length counterparts. Just check your site rules first, as some environments still require full-leg protection. Shorts aren't suitable where there's a risk of cuts, abrasion, hot materials or chemical splashes, and anyone who kneels a lot still needs kneepad protection. Lightweight trousers in breathable fabric are a good middle ground.

Sun protection is often forgotten. For outdoor trades, long-sleeved UV-protective tops, bucket hats and neck flaps reduce sunburn risk during long days outside. Don't forget sunscreen and plenty of water breaks. Where helmets are required, look for brims or neck flaps designed to fit that helmet.

Encourage workers to cover up, take breaks in the shade and look out for each other. Early signs of heat exhaustion include headache, dizziness, heavy sweating and feeling sick; anyone affected should rest somewhere cool and drink water. HSE publishes practical guidance on working in hot conditions.

Breathable safety footwear

Footwear matters too. Breathable safety trainers and boots with moisture-wicking linings prevent hot, sweaty feet without compromising on toe protection or slip resistance. Our guide to safety trainers vs safety boots helps you decide which suits each role.

Good socks matter as much as the shoe. Choose thinner, moisture-wicking pairs for summer, change them daily and give footwear time to dry out between shifts. For the rest of the year, our winter workwear guide covers layering for the colder months.

Quick answers

Can you wear shorts on a building site?

It depends on the site. Many principal contractors require full-length trousers, and shorts aren't suitable where there's a risk of cuts, burns or chemical splashes, so check the site rules and your risk assessment first.

What is the best fabric for summer workwear?

Lightweight polycotton and moisture-wicking polyester work well because they let air move and draw sweat away from the skin. Avoid heavy cotton for physical work in hot weather, as it stays damp.

Do you still need hi-vis in summer?

Yes. Visibility requirements apply all year, so choose lightweight hi-vis polos or t-shirts certified to EN ISO 20471 in the class your site requires.

Get your team summer-ready with our polo shirts and t-shirts, all customisable with your company logo, or get in touch for help choosing lightweight kit.