OS 01 Essence Black Technical Stretch Twill
Timo is 189 cm / 6'2 and wearing size M
Frequently bought together.
The OS 01 Essence comes in a mid-weight twill, and the weave is what gives it structure. Substantial enough to hold its shape through a full day of wear, without losing the drape that makes it fall right. Comfortable enough to erase the line between the office and the couch, and sharp enough for either.
Cut like a shirt rather than a jacket, with a relaxed silhouette that layers easily over a tee or a knit.
Pair it with the TP 01 Essence, made from the same fabric, and wear the two tonal or split them up across the rest of the wardrobe.
- Dyed after weaving for a deep, even colour that holds through every wash.
- Mid-weight woven twill at 285g/m2.
- Button-up front closure with a clean folded collar.
- Slightly rounded split hem.
- Relaxed fit with room to layer over a tee.
- Composition: 62% Polyester, 34% Viscose, 4% Elastane.
- The ETQ signature square at the back of the neck.
- Seasonless design suitable for every occasion.
- Made in Turkey. Designed in the Netherlands.
- Easy care, machine wash inside out at max. 30°C on a gentle cycle.
- From the collections Menswear and Overshirts
Timo is 189 cm / 6'2 and wearing size M
Not sure on size? Check our measurement guide, or .
Shop the look
Made by specialists.
No single factory does everything well. So we don't ask one to. Every piece is built by the maker who masters that exact craft — the cut, the cloth, the finish. Chosen for skill, never convenience. It shows in how it's made, and in how long it lasts.
Sharp, never stiff.
The ease of your softest loungewear, with the line of real tailoring. The kind of comfort you stop noticing — on a silhouette that still reads refined.
Product design, not fashion.
From our Dutch studio we don't reinvent each season. We refine. The same icons, made better every time — the wardrobe you keep, not the trend you replace.
Shop the look
Made by specialists.
No single factory does everything well. So we don't ask one to. Every piece is built by the maker who masters that exact craft — the cut, the cloth, the finish. Chosen for skill, never convenience. It shows in how it's made, and in how long it lasts.
Sharp, never stiff.
The ease of your softest loungewear, with the line of real tailoring. The kind of comfort you stop noticing — on a silhouette that still reads refined.
Product design, not fashion.
From our Dutch studio we don't reinvent each season. We refine. The same icons, made better every time — the wardrobe you keep, not the trend you replace.
Shipping & Delivery
Order before 16:00 and we ship your order the same working day.
Your order ships from our UK warehouse with Royal Mail. No customs, no import duties, no extra costs.
| Country | Shipping | Delivery |
|---|---|---|
| United Kingdom Royal Mail · before 16:00 |
Free from £130 £6 below |
2 days |
Good to know
- We dispatch on working days, so not at weekends or on UK bank holidays.
- Delivery times are a guide. Very occasionally it takes a day longer, for example while your payment is still being processed.
- We don’t deliver to PO boxes.
Insured in transit
Your order is insured until it reaches you. Sometimes we ask for a signature on delivery; from then on, the parcel is your responsibility. If someone else signs for you, their signature counts as proof of delivery.
Questions about shipping? Our customer service is happy to help.
Returns & exchanges
Easy returns in the UK
Return or exchange within 14 days of receiving your order, through our return portal. Your return goes to our UK warehouse, so there are no customs or duties to deal with. Exchanging for another size is free.
| Country | Return fee | Exchange |
|---|---|---|
| United Kingdom | £6 | Free |
Good to know
- Send your items back clean and unworn, with their tags and packaging. That way we can process them quickly.
- Underwear can only be returned with the seal intact.
- Returning more than one item? We charge a £2 handling fee for each extra item.
- You can also send your return with your own carrier. Even so, we recommend our return portal: if your parcel goes missing on the way, we’re responsible, and we process your return faster. We can’t reimburse the cost of your own carrier.
- Price difference because of a promotion? We make up for it with a voucher.
- If an item doesn’t meet these conditions, we may refund it in part or not at all.
How it's made - Menswear
All ETQ garments are crafted in family-owned ateliers.
We team up with ateliers that work with traditional methods. Cutting, crafting, and stitching piece by piece with ultimate care. Unlike fast fashion companies, we have the luxury to take our time. Slow motion. We are masters of precision engineering.
Endless Comfort - Menswear
You look sophisticated, yet feel like Sunday mornings.
When it comes to materials, our bar is high. Only the finest materials enter the Atelier. No shortcuts. ETQs premium weaves and knits are smooth like butter. They are durable and have recovery properties. They stay in shape. And so will you.
Quality matters. We focus on things, that even the eye can't see. Obsessive, yes. But: soon after wearing ETQ you will notice the quality difference.
Dutch Design
Strong silhouettes. Nuanced colors. Thick layers of quality and a thin layer of logos. That’s ETQ. We master precision engineering and tinker with our products as if they were race cars. Every collection is the same but evolved. Continuously.
And so our story goes on. Evolving classic etiquette to match the pace of today. We don’t just do it. We do it with grace.
Product reviews (2)
Nice clothing
Very nice color and fit
Lightweight overshirt
A beautiful overshirt made of comfortable fabric.
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Added to shopping bag
Choose colour
| EU | US | UK | CM |
| 39 | 6 | 5 | 25.7 |
| 40 | 7 | 6 | 26.4 |
| 41 | 8 | 7 | 27.0 |
| 42 | 9 | 8 | 27.7 |
| 43 | 10 | 9 | 28.3 |
| 44 | 11 | 10 | 28.9 |
| 45 | 12 | 11 | 29.6 |
| 46 | 13 | 12 | 30.2 |
| 47 | 14 | 13 | 30.9 |
How to measure
Let’s find your perfect fit. Place a sheet of paper on the floor against the wall and put your feet (with socks) on it, heels against the wall. Make sure you lean on your feet with full power when measuring. Now you simply draw a line at the end of the biggest foot. Measure the distance with a ruler and find the size that matches it: see size table. Are you in between sizes? In that case, we suggest taking the bigger size.
OS 01 Essence - Size Guide
All measurements in centimetres.
Use an overshirt with a similar fit as your reference. Lay it flat and compare the measurements below.
| Size | Shoulder | Sleeve | Chest | Total |
|---|---|---|---|---|
| S | 48 | 65 | 56 | 75 |
| M | 50 | 66 | 58 | 76 |
| L | 52 | 66 | 60 | 76 |
| XL | 54 | 67 | 62 | 77 |
Measurements are taken flat, from seam to seam.
How to measure
Grab your favorite overshirt, preferably with a similar fit, and lay it flat on a surface. Use this item as your reference to compare the measurements above.
Shoulder
Measure straight across the back, from one shoulder seam to the other.
Sleeve length
Starting at the shoulder seam, measure down to the end of the sleeve.
Pit to pit / Chest
Measure from one armpit seam to the other, straight across the front.
Total length
Measure from the highest shoulder point straight down to the hem.
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Added to shopping bag
Choose size
| EU | US | UK | CM |
| 39 | 6 | 5 | 25.7 |
| 40 | 7 | 6 | 26.4 |
| 41 | 8 | 7 | 27.0 |
| 42 | 9 | 8 | 27.7 |
| 43 | 10 | 9 | 28.3 |
| 44 | 11 | 10 | 28.9 |
| 45 | 12 | 11 | 29.6 |
| 46 | 13 | 12 | 30.2 |
| 47 | 14 | 13 | 30.9 |
How to measure
Let’s find your perfect fit. Place a sheet of paper on the floor against the wall and put your feet (with socks) on it, heels against the wall. Make sure you lean on your feet with full power when measuring. Now you simply draw a line at the end of the biggest foot. Measure the distance with a ruler and find the size that matches it: see size table. Are you in between sizes? In that case, we suggest taking the bigger size.
OS 01 Essence - Size Guide
All measurements in centimetres.
Use an overshirt with a similar fit as your reference. Lay it flat and compare the measurements below.
| Size | Shoulder | Sleeve | Chest | Total |
|---|---|---|---|---|
| S | 48 | 65 | 56 | 75 |
| M | 50 | 66 | 58 | 76 |
| L | 52 | 66 | 60 | 76 |
| XL | 54 | 67 | 62 | 77 |
Measurements are taken flat, from seam to seam.
How to measure
Grab your favorite overshirt, preferably with a similar fit, and lay it flat on a surface. Use this item as your reference to compare the measurements above.
Shoulder
Measure straight across the back, from one shoulder seam to the other.
Sleeve length
Starting at the shoulder seam, measure down to the end of the sleeve.
Pit to pit / Chest
Measure from one armpit seam to the other, straight across the front.
Total length
Measure from the highest shoulder point straight down to the hem.