Providing the toughest and safest gear since 1979

Waterproof Work Trousers

[FREE shipping on Blaklader over £50.] Inclement weather can make working outdoors tough, unproductive and dispiriting. Getting soaked during power-washing or cold store tasks isn't much better! Our certified Waterproof Work Trousers will shield you from the rain while you do your job. To provide extra protection at your lower back, we also offer waterproof trousers with braces, which are handy if you work while bending over. 

Looking for Plus Size Waterproof Trousers?

Look no further. For most waterproof work trousers, we offer a wide range of sizes even up to 4XL to suit different hardworking heroes, so you can perform at your best.


Waterproof Ratings Explained

Waterproof ratings are measured in mm and usually fall anywhere from 800mm to 10,000 mm. These figures indicate the amount of water pressure a fabric can withstand. For example, a waterproof garment with a 2,000mm rating can endure a 2,000mm column of water bearing down on it before it starts to leak.
• 1,500mm – 2,500mm: Suitable for very light showers and everyday use whether it be around town or walking the dog.
• 5,000mm - 10,000mm: Suitable for most weather conditions.
• 10,000mm and Up: For extremely wet conditions (or to protect you in all weather conditions), a jacket of 10,000mm or above will offer the most protection and also be the most breathable.


What does EN 343 (Standard for Waterproof Workwear) say?

The EN 343 standard promotes two high values: water penetration (or called waterproofness) and water vapour resistance (or called breathability). If a garment is EN343 Class 3.1 certified, the ''3'' indicates the level of waterproofness whereas the ''1'' indicates the level of water vapour resistance.
Waterproofness - the larger the figure, the better it is for waterproofness
• Class1: ≥ 800 mm [Before pre-treatment]
• Class2: ≥ 800 mm [After pre-treatment]
• Class3: ≥ 1300 mm [After pre-treatment]
• Class4: ≥ 2000 mm [After pre-treatment]
Some of our Blaklader waterproof work trousers have a water column of 10,000 mm (such as womens softshell trousers) and even 15,000mm (such as winter hi vis trousers), which means they are way above what the standard defines as waterproof, ideal for challenging work environments to ensure no water penetration.
Water vapour resistance - the lower the ret-value, the better it is for the breathing capacity:
• Class1: ret > 40
• Class2: ret 25-40
• Class3: ret 15-25
• Class4: ret < 15
Note: The figures are based on EN 343:2019, the latest version of the standard which indicates 4 classes