This blog explains everything you need to know about S7 boots, where they sit in the EN ISO 20345 safety footwear standards, and most importantly, whether you need a pair!
The ‘S’ in S7 stands for ‘safety,’ while the number '7' tells us it's in the 7th - and highest - category of the EN ISO 20345:2022 safety classes. So, any boot with an S7 certification is a highly protective piece of footwear, designed for demanding environments where workers may face:
To meet the EN ISO 20345:2022 safety standards, S7 safety footwear must include all of the following:
Essentially then, an S7 safety boot has all the features of an S3 boot, except it comes with a built-in waterproof membrane to keep feet fully dry.
On the tongue label or spec sheet of an S7 boot, you might see an 'L' or an 'S' after the 'S7.' So, what's the difference between an 'S7L' and 'S7S' boot?
These letters indicate how the boot’s penetration resistance has been tested if the insert is non-metal.
These two tests allow wearers or specifiers to choose the option that best suits their working conditions and hazard type: the difference lies in the anti-penetration midsole testing method used, not the level of protection provided.
There's no direct equivalent of an S7 boot in the EN ISO 20345:2011 safety footwear standards, but the closest comparison would be an S3 boot with added waterproofing.
This is important to remember, because it is still possible to buy or sell waterproof safety footwear tested to the old 2011 standard. While this edition can't now be used to test any new footwear, because 2011 certifications were being given to footwear up until late 2024 and remain valid for 5-years, waterproof S3 boots from EN ISO 202345 2011 could still be in use and sellable up until 2029.
But don't forget, an S7 boot doesn't have to stop at waterproofing: features can be added to a standard S7 certification like metatarsal safety, anti-abrasion scuff caps and ankle protection, making a highly protective style even tougher.
Pictured: The Female Fit 'Invincible' is an S7 boot with added metatarsal and ankle protection, with ladder grips for added traction when working at height
Now you’ve explored what sets S7 boots apart and how they fit within EN ISO 20345:2022, you’ll know that while they deliver a very high level of protection, that alone isn’t enough: long‑lasting comfort is just as vital. With so many S7 options on the market, it’s important to choose a boot that matches both your safety requirements and the way you work.
If you’re a work boot wearer or supplier looking for an S7 solution that delivers optimum protection and comfort, why not use the V12 Boot Finder? Simply pop in your workplace conditions, hazards and requirements, and we’ll provide you with a tailored recommendation. Click below to get started.