Buying guide · Hot weather
British summers are short and increasingly brutal, and outdoor trades feel every degree. Hot-weather kit is a genuine safety topic — heat stress degrades judgement before it drops anyone, and UV is a career-length skin-cancer dose for outdoor workers — but most of the fixes are fabric choices, made in advance.
The physics
The instinct in a heatwave is minimum fabric; the physiology disagrees. Bare skin in direct sun gains radiant heat and UV dose; what actually cools is evaporation — which a lightweight wicking synthetic accelerates by spreading sweat, while a soaked cotton tee just sits wet and heavy against the skin. So summer buying is fabric-first: wicking tees and polos, lighter-gsm trousers with stretch and venting, and technical base layers that do in July what they do in January — move moisture.
Sun is the quieter hazard. Outdoor workers carry multiples of the general population's UV exposure, and long sleeves in light wicking fabric with a UPF rating beat sunscreen's reapply-every-two-hours reality for arms and shoulders. Neck flaps and brims on headwear cover the spots that burn first.
The list
| Item | What to buy | The detail |
|---|---|---|
| Tees & polos | Lightweight wicking fabric | Cotton comfort is a myth once you're sweating |
| Trousers / shorts | Light-gsm stretch trousers; shorts where policy allows | Many sites ban shorts (impact, UV, chemical exposure) — check first |
| Hi-vis | Mesh-backed vests and lightweight Class 2/3 garments | Compliance doesn't pause for heat — class rules hold |
| Sun protection | UPF-rated long sleeves, brimmed or flapped headwear | Plus sunscreen for face and hands — the unwearable zones |
| Footwear | Breathable-upper safety trainers where the risk assessment allows | S1P in breathable builds exists for exactly this |
Heat stress
Questions
Only if the site allows it — many don't, citing impact and abrasion risk, UV exposure and task hazards, and some allow them only for specific trades or with specific risk assessments. It's a site policy question, not a legal entitlement either way. Lightweight stretch trousers are the compromise that usually survives the argument.
Lightweight moisture-wicking synthetics (or technical blends) that spread sweat and let it evaporate — evaporation is what cools you. Heavy cotton feels natural but holds sweat against the skin. For sun exposure, light long sleeves with a UPF rating often beat bare arms on both comfort and dose.
No — if the risk assessment says Class 2 or 3, it says so in August. The answer is summer-weight hi-vis: mesh-backed vests, lightweight polos and jackets certified to the same EN ISO 20471 classes. Compliance and comfort aren't in conflict once you buy for the season.
Everything in these guides is stocked, embroiderable and priced for teams.