Breathability Ratings

Here’s a closer look at how breathability works, how ratings like Moisture Vapour Transmission Rate (MVTR) come into play, and how to choose the best options for workwear like jackets, trousers, softshells, and overalls.

When selecting workwear for challenging environments, staying comfortable is key. Breathability ratings provide a measurable standard to ensure that garments allow moisture and heat to escape, keeping the individual wearing the garment dry and comfortable.

Breathability in workwear refers to a garment’s ability to allow moisture – usually sweat – to escape, rather than trapping it inside. This keeps the wearer cool and comfortable, preventing overheating in high-activity situations. While MVTR (Moisture Vapour Transmission Rate) is the technical term, we use “breathability” on our website to keep things straightforward for our customers.

MVTR measures the rate at which moisture passes through a fabric over 24 hours, typically in grams per square metre (g/m²). Higher MVTR values indicate more breathable materials, essential for workwear that sees high activity or fluctuating temperatures. 

The rating also factors in a garment’s layers – whether it’s a single fabric layer, like some softshells – or a multi-layered construction with membranes, which are common in waterproof jackets and overalls.

Different breathability levels are suited to various work environments:

• Low breathability (below 5,000 g/m²) is ideal for light work or colder environments where heat retention is beneficial.
• Moderate breathability (5,000–10,000 g/m²) suits average working conditions where occasional exertion and mild temperatures are expected.
• High breathability (above 10,000 g/m²) is ideal for intense activities, especially in warmer climates or during physical labour.
• Advanced breathability (15,000-20,000 g/m²) are perfect for high-activity tasks in moderate to warm climates. These garments offer superior moisture-wicking properties, making them ideal for extended wear in environments where both durability and comfort are essential.
• High performance breathability (exceeding 20,000 g/m²) is ideal for extreme or prolonged activities in warmer conditions. These high-performance options provide exceptional moisture management, ensuring comfort and dryness even during the most demanding tasks.

In workwear, balancing breathability with waterproofing is essential. Many high-breathability fabrics also offer waterproof protection, though with varying degrees of efficiency. When selecting products, look for a balance that matches your typical work conditions: softshells for flexibility and moderate breathability or fully waterproof overalls with enhanced MVTR ratings for prolonged outdoor work.

When choosing breathable workwear, check ratings, consider the activity level, and remember that garments with specific breathability levels can make all the difference in comfort and performance on the job.