Half Canvas
Reinforces fine fabrics and shapes a natural breast form. Over time, this insert adapts to your body and gives you a unique fit.
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1-2 Tage
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"This comfortable vest completes your IOS suit."
Comfortable to wear: vest with maximum freedom of movement
Crease-resistant & keeps its shape: non-iron thanks to performance jersey
Moisture regulation: for a pleasant wearing comfort
No wear out & shrinkage: retains its fit permanently
Athletic fit: slim cut without constricting
High performance: smart business look with sportswear comfort
Lightweight & breathable: high-tech sportswear material
High-tech performance: 74% polyamide 26% elastane
Made in Italy: Innovative performance jersey from Italy
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IOS VEST Classic – The modern vest for maximum impact
The IOS VEST Classic is more than just an addition to your blazer – it is a statement of style, structure, and smart functionality.
It gives your IOS SUIT the formal character of a three-piece suit while remaining pleasantly lightweight, breathable, and highly flexible.
Whether worn under a blazer in a business context or on its own at dinner or an event – the IOS VEST Classic creates a dressed-up look with full freedom of movement.
The elastic Performance Flex Jersey was originally developed for high-performance sports – and now delivers uncompromising comfort in businesswear.
Your benefits at a glance:
Perfectly combined: Complements the IOS JACKET to create a three-piece silhouette
Slim fit with sporty lightness – modern fit, perfect line
Maximum comfort: breathable, elastic, wrinkle-free & ultra-light
Easy care & travel-ready – smooths itself out, no ironing required
Versatile to wear – under a blazer or on its own for a clean, dressed-up look
Material & Care:
74% polyamide, 26% elastane – Italian Performance Flex Jersey
Care: Dry clean only
Self-smoothing – simply hang it up, it smooths itself out through body heat
No pilling, no bagging, no distortion
Fit & Style:
Slim fit – close to the body & modern
Comfortable, elastic outer material
Practical inner pockets
Ideal for events, business & travel
Model: 175 cm, 75 kg, wears size 48
FAQ:
Can I wear the IOS VEST Classic without a blazer?
Yes – that is exactly what it was co-developed for. The slim, modern fit also creates a dressed-up, stylish look on its own – whether worn with a shirt, turtleneck, or T-shirt.
Is the vest comfortable enough for long days or travel?
Absolutely. The elastic performance fabric was developed for high-performance sports and offers maximum freedom of movement, lightness, and wrinkle resistance – perfect for meetings, dinners, or long-haul flights.
Do I need to iron the IOS VEST Classic?
No – simply hang it on a hanger, and the vest smooths itself out through gravity and body heat. For a perfect finish, wearing it is often enough.
SHIPPING COSTS:
At IOS, we offer standard shipping across the European Union.
The shipping provider (DHL or DPD) can be selected individually.
Shipping costs are:
DELIVERY TIME
Parcels are delivered within 1–2 business days.
SHIPPING PARTNERS
Our shipping partners are DHL and DPD.
PAYMENT INFORMATION:
At IOS, we make shopping easy and secure. On our website, we offer the following payment methods:
Did you know that a suit rarely fits perfectly right away?
For almost every suit purchase, the following adjustments are usually needed:
These two adjustments together typically cost around €40–50 at a good tailor and can be done quickly and reliably. So if our suit doesn’t fit perfectly right away, that’s completely normal – you simply need a local tailor to perfect it for you.
If you have any questions about your suit or trousers, feel free to contact us directly – we’re happy to support you personally.
Exchanges & Returns
Would you like to return an item?
You’ve placed an order with us, but need a different size, don’t like the product, or received a damaged item? No problem!
We make returns easy.
Use the following link to access our returns portal, where you can process your return or exchange online using your order number and email.

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Free exchange
Delivery time
1-2 days
Fast returns & exchanges
Thanks to its innovative fabric construction, our performance flex jersey offers a great deal of flexibility and freedom of movement. This allows us to create the perfect fit that is close-fitting but not restrictive.
Our multidirectional stretch ensures high dimensional stability and resilience, which prevents wear and creasing in the long term.
The combination of ultra-fine microfibers with Lycra makes the fabric particularly lightweight. In combination with a special knitting technique, the fabric always remains particularly smooth, making it ideal for traveling and on the go.
This is how your jacket is constructed.
Reinforces fine fabrics and shapes a natural breast form. Over time, this insert adapts to your body and gives you a unique fit.
A precisely coordinated arrangement of natural fabric layers that forms a stable chest and shoulder structure.
This inner finish preserves the natural shape of the breast with a perfect drape.
The high-quality inserts are light as a feather, comfortable and give the jacket volume.
Alle IOS Produkte bieten dir maximalen Komfort, moderne Schnitte und besonders hochwertige Qualität.

The jacket has a modern, more body-hugging fit.
Use your usual jacket size as a guide and check the notes on the product page. The modern slim fit fits cleanly at the shoulders and remains comfortable in the torso. If you are wavering between two sizes, opt for the larger size. Feel free to use our size finder on every product page.
For a classic look, navy, dark blue, dark gray or black are a safe choice.
If the dress code is conservative, many people go for navy or black because it looks calm and professional. Beige or light gray bring a little freshness, but remain serious. Forest and light brown work well for smart casual and can be combined with a shirt or fine knit. Choose the color that is easy to combine with your shoes and pants.
Yes, both the jacket and the trousers are made for everyday comfort.
The styles combine a modern fit with freedom of movement so that you feel comfortable in the office, at appointments or on the go. The fabric is comfortable to wear and is designed for easy care. This makes the suit suitable for long days without much effort. It doesn't crease and always keeps its perfect shape without wearing out. A comfortable slim fit suit that always makes you look and feel good.
You choose the model, color and size, add it to the shopping cart and go to the checkout. Returns and exchanges are quick and easy via our returns portal.
In the checkout, you will see the available shipping options and payment methods. After placing your order, you will receive a confirmation and can contact support if you have any questions.
If something doesn't fit, you can exchange it for the right size free of charge or simply return it.
Hanging and airing is usually sufficient.
After wearing the jacket, hang it on a stable hanger, gently smooth out any creases and air it briefly. Store it in the wardrobe with some space to keep its shape. Check the care instructions before cleaning. When traveling, a light cover helps to ensure that the jacket arrives protected.
The jacket should always be dry-cleaned according to the care instructions. The trousers, on the other hand, can be washed easily in the household wash according to the care instructions.
Yes, the IOS SUIT is the perfect wedding suit if you are looking for a very comfortable slim fit suit for your wedding.
The IOS SUIT is also perfect as a guest at a wedding, as it is smart but not overdressed. You'll feel comfortable and look good!
Decide according to the occasion, your style and the pieces you already wear.
Navy and black are very versatile and go with most business outfits. Beige and Light Brown add summery warmth to your look. Petrol Blue and Forest add a modern accent but remain understated. Take a look at the pictures on the product page and choose the suit that is easy to combine with your shoes and shirts or simply the one you like.
Be the first to find out about the latest product innovations and offers.
IOS is an innovative formalwear concept that combines stylish fashion with function and comfort.
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"This comfortable vest completes your IOS suit."
Comfortable to wear: vest with maximum freedom of movement
Crease-resistant & keeps its shape: non-iron thanks to performance jersey
Moisture regulation: for a pleasant wearing comfort
No wear out & shrinkage: retains its fit permanently
Athletic fit: slim cut without constricting
High performance: smart business look with sportswear comfort
Lightweight & breathable: high-tech sportswear material
High-tech performance: 74% polyamide 26% elastane
Made in Italy: Innovative performance jersey from Italy
![]()
IOS VEST Classic – The modern vest for maximum impact
The IOS VEST Classic is more than just an addition to your blazer – it is a statement of style, structure, and smart functionality.
It gives your IOS SUIT the formal character of a three-piece suit while remaining pleasantly lightweight, breathable, and highly flexible.
Whether worn under a blazer in a business context or on its own at dinner or an event – the IOS VEST Classic creates a dressed-up look with full freedom of movement.
The elastic Performance Flex Jersey was originally developed for high-performance sports – and now delivers uncompromising comfort in businesswear.
Your benefits at a glance:
Perfectly combined: Complements the IOS JACKET to create a three-piece silhouette
Slim fit with sporty lightness – modern fit, perfect line
Maximum comfort: breathable, elastic, wrinkle-free & ultra-light
Easy care & travel-ready – smooths itself out, no ironing required
Versatile to wear – under a blazer or on its own for a clean, dressed-up look
Material & Care:
74% polyamide, 26% elastane – Italian Performance Flex Jersey
Care: Dry clean only
Self-smoothing – simply hang it up, it smooths itself out through body heat
No pilling, no bagging, no distortion
Fit & Style:
Slim fit – close to the body & modern
Comfortable, elastic outer material
Practical inner pockets
Ideal for events, business & travel
Model: 175 cm, 75 kg, wears size 48
FAQ:
Can I wear the IOS VEST Classic without a blazer?
Yes – that is exactly what it was co-developed for. The slim, modern fit also creates a dressed-up, stylish look on its own – whether worn with a shirt, turtleneck, or T-shirt.
Is the vest comfortable enough for long days or travel?
Absolutely. The elastic performance fabric was developed for high-performance sports and offers maximum freedom of movement, lightness, and wrinkle resistance – perfect for meetings, dinners, or long-haul flights.
Do I need to iron the IOS VEST Classic?
No – simply hang it on a hanger, and the vest smooths itself out through gravity and body heat. For a perfect finish, wearing it is often enough.
SHIPPING COSTS:
At IOS, we offer standard shipping across the European Union.
The shipping provider (DHL or DPD) can be selected individually.
Shipping costs are:
DELIVERY TIME
Parcels are delivered within 1–2 business days.
SHIPPING PARTNERS
Our shipping partners are DHL and DPD.
PAYMENT INFORMATION:
At IOS, we make shopping easy and secure. On our website, we offer the following payment methods:
Did you know that a suit rarely fits perfectly right away?
For almost every suit purchase, the following adjustments are usually needed:
These two adjustments together typically cost around €40–50 at a good tailor and can be done quickly and reliably. So if our suit doesn’t fit perfectly right away, that’s completely normal – you simply need a local tailor to perfect it for you.
If you have any questions about your suit or trousers, feel free to contact us directly – we’re happy to support you personally.
Exchanges & Returns
Would you like to return an item?
You’ve placed an order with us, but need a different size, don’t like the product, or received a damaged item? No problem!
We make returns easy.
Use the following link to access our returns portal, where you can process your return or exchange online using your order number and email.


