Breathability is a key feature of many MAIUM products. Our rainwear is designed for movement, allowing heat and moisture to escape from the inside while keeping rain out. That balance is essential in clothing that’s ready for any type of weather and made for everyday use, urban mobility, and life on the go.
Breathability is achieved through microscopic openings in the TPU laminate of our fabrics. These openings are smaller than water droplets, preventing water from penetrating the fabric while allowing water vapor to escape. This results in rainwear that feels more comfortable when moving in changing conditions.
How Breathability Works
Breathability is measured using the Moisture Vapor Transmission Rate, or MVTR. This test shows how much water vapor can pass through a fabric in 24 hours and is expressed in grams per square meter per 24 hours, written as g/m²/24h. For example, a fabric with a value of 3000 g/m²/24h can allow up to 3000 grams of moisture vapor to pass through per square meter of fabric in 24 hours.
As a general rule, the higher the MVTR value, the more breathable the fabric is.
Breathability and activity level
More than 3,000 g/m²/24h is suitable for light exercise, such as regular cycling.
More than 5,000 g/m²/24h is better suited for more strenuous exercise, such as more intense cycling.
Breathability is influenced by the fabric’s construction, thickness, and any coatings or treatments applied to the material. How breathable rainwear feels can also vary depending on activity level, weather conditions, and personal preference. Since this varies by model, we recommend checking the “Specifications & Size Chart” section on each product page for the most accurate product information.
Short Questions
What does "breathability" mean in rainwear?
Breathability helps moisture and heat escape from inside a jacket while keeping rain out. In many MAIUM styles, this is enhanced by the fabric construction and TPU lamination, resulting in rainwear that’s ready for any weather and feels more comfortable when you’re on the move.
How is breathability measured?
Breathability is measured using MVTR, which stands for Moisture Vapor Transmission Rate. This indicates how much moisture vapor can pass through a fabric in 24 hours and is expressed in g/m²/24h. In general, the higher the MVTR value, the more breathable the fabric is.
Is MAIUM rainwear designed for physical activity?
Yes. Our rainwear is designed with everyday movement in mind.
Are all MAIUM products breathable?
No. Breathability depends on the model, the fabric construction, the thickness, and any coatings or treatments applied to the fabric. Some rainwear with a PU coating is inherently non-breathable. That is why these models have ventilation openings under the armpits.
Where can I check the breathability of a specific item?
For the most accurate product information, please refer to the product page and specifications for each item.
