Maium Etymology

In Dutch there are hundreds of words and sentences to talk about rain, MAIUM is one of them. It is a word from the 'Bargoens', in which it can mean 'rain', 'water' or even 'canal' – of which we have quite a few in Amsterdam.


We are two friends from Amsterdam who grew up cycling through the rain and saw that traditional rainwear lacked both style and functionality. Inspired by years of wet bike rides, our aim is to design stylish raincoats that can adapt to unpredictable weather and busy lives. Designer Anita: “Regardless of whether we had a business meeting, visited a friend or went to a festival, there was always the risk of getting a wet suit every time we traveled from A to B. That's why we came up with MAIUM, on the road in style, knowing that you and your clothes are protected.”

Maium Word usage

‘Als ik MAIUM op m’n porem krijg dan gaan ik pleite’ – a saying that means, if the rain falls on my head I am leaving.


MAIUM is a product of its environment. With at least 130 rainy days a year and over a third of the land below sea level, we've gained a reputation for devising innovative ways to keep ourselves dry.



Hang a wet raincoat to dry, preferably on a hanger. Even a dry MAIUM raincoat will always have to hang on a hanger to keep its shape. Tell friends about your experiences with MAIUM. Expect and accept compliments.


Leaving a wet raincoat folded or crumpled in a dark place, such as in a bag. Iron your raincoat. Put your raincoat in the dryer. Forgetting your raincoat after Friday afternoon drinks or leaving it behind at a festival.

Washing instructions

Please refer to the information on the product specifications page under 'specification and size chart' for the right indication for your product in terms of washing instructions.


All our front zippers are waterrepellent and open on both sides. If the zipper does get stuck, we recommend greasing it with a drop of silicone gel or spray.

Bike Poncho

Open the signature zippers on both sides. Throw the front panel over the steering wheel. Grab the handlebars through the special 'bicycle holes'. Or just let it hang over your knees.


Difference between Puffer and Lightweight Puffer

The Lightweight Puffer is made of Pongee fabric, which increases breathability, while the Puffer is made with a Polyurethane coating. The Lightweight Puffer is 6 inches longer than the Puffer. Both are filled with recycled plastic, not down.


Our raincoats are 90% made from post-consumer recycled plastic. The fabrics we produce are certified, demonstrating that they are actually made from recycled yarns and woven in a sustainable, ecological way, without the use of harmful substances. These certificates are issued by independent partner institutes.

Production Ethics

The fashion industry is one of the most environmentally damaging industries in the world, so it is vital that forward-thinking designers combine fashion and design to create sustainable, functional and timeless alternatives. A raincoat is, by definition, designed to protect us from the elements. The effort we make to reconnect with nature through sustainable design practices is our way of giving back and protecting the elements from us and our behavior. We want to prove that fashion and innovation don't have to spoil the planet.


Our coats are PFAS-free. PFAS is the abbreviation and umbrella name for Poly and perfluoroalkyl substances. These are man-made chemicals and do not exist in our environment. As such, they are almost impossible to break down. PFAS have useful properties: they are water, grease and dirt repellent, which is why they are often used in making rainwear. There are specific "PFAS," for example, PFOA and PFOS and PFCs that can have harmful effects on humans. We do NOT use all of these chemicals in our products.


All materials used are either made from recycled plastic or are completely biodegradable. In our jackets we use a variety of materials such as recycled PET, Organic Cotton, Pongee and PU.

Water resistance

All our raincoats are completely waterproof at water column 3,000 or 5,000.


All our pongee, lightweight and organic cotton jackets have a breathability rating of 5,000. All our PU coated jackets are not breathable. But by all means open the zips for fresh air!


No animal substances are used in the production of MAIUM raincoats, and all raw materials are not tested on animals.

Factory audits
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Product sites

MAIUM raincoats are produced in Beijing, China, the epicenter of outerwear. All production facilities are located in Hebei province, where the factories are known for their excellence in producing technical clothing. They are regarded worldwide as the best in technological developments in the field of waterproofing.


Customer service opening hours

Our customer service is available from Monday till Friday via or by telephone +31 (0) 20 244 10 81


We regularly supplement our existing articles. If a product is sold out, you can register to receive an email notification when it is back in stock. If one article becomes available, we advise you to respond promptly.

Contact details

For questions about an order, return or other product related questions, please send an email to . For general questions, please email . You can call on +31 (0)20 244 10 81.

Response time

We will get back to all your questions as soon as possible with a real, personal answer.


If you no longer wish to receive the newsletter, you can unsubscribe via the 'Unsubscribe' link at the bottom of an email you receive from us.


Multiple Item Returns

Returning multiple items is possible, create one label via this link . When creating the return label, you must add the order numbers of the returned items as a comment.

United Kingdom Returns

You can register a return from the UK via this link . Please complete the form and include it with your return.

Exchange a product?

A return label can be created via this link .
Please indicate in the comments field which product you wish to receive.
As soon as we have received the returned product, we will send the new jacket.

– Please note, the jacket cannot be exchanged for a model with a different price.

Return Policy

Not happy with the size or color? Then return your MAIUM within 30 days. We use Returnless to handle our returns. Via this link you can fill in the return form and request a return label. The MAIUM must be returned unused and undamaged with the labels attached to the item. Online orders cannot be returned to stores and can only be returned to us via parcel post. The shipping costs for all returns are for your own account. For complaints or damage, please contact

Where can I find my return label?

You can make your return label via . Enter your e-mail address and your order number here, this number starts with a #.

How do I stick the return label on the shipping bag?

Use strong duct tape around the edges of the return label to prevent the label from falling off the bag during return transport.

How do I pack my jacket for the return process?

Fold the jacket and put it in the same packaging that you received your Maium in. Always enclose the return form.


Refunds are processed in the same way as payment for the order. You will receive your refund within 14 days after the returned item(s) have arrived at our warehouse.


Shipping Destinations

We ship all our products only in Europe

Postage costs

We ship free of charge within Europe. Countries outside the European Union are subject to a surcharge.

Shipping time

Orders are shipped within 24 hours on business days. Weekend orders are shipped the following Monday.


Payment Methods

We accept the following payment methods: iDEAL, Credit Cards, Paypal, Klarna, Sofort Banking, Bancontact, KBC/CBC, Bank Transfer and Belfus Direct.


Warranty conditions

We offer a 1-year manufacturer's warranty on workmanship and manufacturing defects. Our raincoats are made with great care and by hand, with attention to detail to ensure high quality. If you encounter a warranty problem, please contact us at .



We test all our styles each season for waterproofness. To measure waterproofness, we use a hydrostatic pressure measurement machine. This technique determines how much water pressure must be applied to a fabric before it begins to leak. A piece of fabric is stretched at the bottom of a long tube about 10cm in diameter. This tube is filled with water until the water comes through the fabric. When some water just begins to come through the fabric, one measures the height in millimeters of the water in the tube. This height is the water column and the fabric can withstand that measured pressure. With a water column of 3,000mm the fabric leaks when under pressure from 3 meters of water. The higher the water column the greater the protection from rain. A fabric is generally considered waterproof if the water column is 1,000mm or more.

Below is an overview about waterproofness and its uses:

Water column - Weather conditions

1000mm to 3000mm - Resistant to light rain and moderate snow
3000mm to 5000mm - Resistant to medium rain and snow
5000mm to 10,000mm - Resistant to long drives or hikes in heavy rain and wet snow
>10,000mm - Resistant to heavy rain and downpours, wet snow and high pressure

Air Permeability

Air permeability is an important functionality of many of our jackets. Air permeability, or breathability, is a technique that allows moisture to escape from inside to outside while ensuring that water from outside does not enter. Microscopic openings are made in the TPU lamination (LINK) of our fabrics. These are smaller than water droplets, preventing water from penetrating the fabric but allowing vapor to escape. Breathability is tested using the Moisture Vapor Transmission Rate (MVTR). This test measures the rate at which moisture passes through fabric. The MVTR is measured in grams per square meter of fabric per 24 hours (g/m2/24h). How to imagine this is that a fabric with a breathability of 3000g/m2/24h, can allow up to 3000 grams of moisture vapor per m2 of fabric to pass through in a 24-hour period. The higher the MVTR value, the better the fabric breathes.

Breathability - Exercise
>3000 g/m2/24h - Light exertion, such as normal cycling
>5000 g/m2/24h - Heavy exertion, such as hard cycling

It is important to note that breathability measurements are influenced by factors such as fabric construction, thickness and any coatings or treatments applied to the fabric. In addition, individual perception of breathability may vary depending on your activity, environmental factors and personal preferences.