Free returns & exchanges

Knowledge Cotton Apparel Organic cotton ribbed T-shirt | blue "rib t-shirt malibu blue"

€16 €39 -60%
Size

Choose your size

Runs slightly small. If you're often between two sizes, take the larger one.

Free returns & exchanges · 30 days to send it back to us

At your door Thursday 12/11 · free delivery on orders over €150 Free returns & exchanges · 30 days to send it back to us Loyalty programme · 5% of the amount paid added to your credit Excellent on Trustpilot · 4.8/5, 2,993 reviews
This piece in detail +

Good to know

  • The rib hugs the body and springs back after every movement.
  • A plain basic that slips under a jacket or works on its own, without bunching at the waist.
  • GOTS-certified organic cotton, from field to manufacture.

Fabric & feel

Rib knit means fine vertical ridges that give the fabric spring and a soft surface to the touch. The trade-off: 5% elastane. It lets the rib follow your body without squeezing, keep its shape at the shoulders and neckline, and suit more body types.

When to wear it?

On its own from spring to the end of summer, when it's mild. The rest of the year, as a base layer under a jumper or jacket: close to the body, it doesn't add bulk.

Fit & size

Sleeves that stop above the elbow leave your arms free, and the stretchy knit moves with you when you raise your arms or stretch.

Runs slightly small. If you're often between two sizes, take the larger one.

Care guide

Machine wash at 30°C inside out, delicates cycle, do not tumble dry. Make sure the spin is set to 800 rpm maximum. Iron on low heat (110°C). Try a GuppyFriend Bag to protect synthetic fibres and reduce the amount of microfibres released into the washing water.
Material 95% organic cotton, 5% elastane
Country of manufacture India
Fit Fitted
Length Hip length
Collar Round
Sleeves Short
Sheerness Opaque
In-store availability +
Lyon 1er
Unavailable
XS S M L XL
Paris 10ème
Unavailable
XS S M L XL
Environmental cost +

Calculated using the official French government method (Ecobalyse), across the entire life cycle. The lower the score, the lower the impact.

Official French government logo · Ecobalyse v7 regulatory method.

See calculation details ↗

This garment costs the environment 25% less than a conventional equivalent.

The conventional equivalent is the same garment made from non-organic, non-recycled materials in Asia, as is standard in the industry.

Climate change

5 kg CO₂e

6% less

Water used

937 L

88% less

Regulatory environmental labelling · calculated with Ecobalyse.

Delivery & returns +

Delivery costs

Free on orders over €150 in France, Belgium, Monaco, Germany, the Netherlands and Austria. Below that, €3 to a pickup point or €5 for home delivery. See other countries.

Delivery time

Estimated delivery: Thursday 12/11. We do our best to meet this date, but it may still change slightly. Sold and shipped by WeDressFair.

Returns & exchanges

Free returns & exchanges

You have 30 days from receipt to try on your items at home, at your own pace.

Not right for you?

Returns are free: we refund you to your payment method as soon as your parcel has been processed.

Wrong size?

Request another size from your account: the exchange is free, including the return and the new delivery.

How does it work?

In your account, click "Return or exchange", then download your label: there's nothing to pay.

How to make an exchange

Loyalty programme

Every order placed with your account earns you 5% of the amount paid in credit. It's added automatically at the end of the return period, then applied on the payment page of your next order. It never expires. Find out more.

Our commitments for this piece

  • 95% sustainable materials

    95% organic cotton, 5% elastane.

  • Vegan

    No animal-derived materials.

  • GOTS certified

    Certifies at least 95% organic materials (in the product or its organic part) & working conditions in line with the International Labour Organization. The label →

  • Verified workshops

    We have checked the documents provided by Knowledge Cotton Apparel about its production workshops and the materials used, against the criteria in our charter.

Our charter & our method

Our method

01

We seek out

We look for brands whose approach actually holds up, not the ones with the best marketing.

02

We analyse

We ask for workshop names, compositions and labels, along with the proof to back them up.

03

We validate

Without proof, a brand doesn't make it into our catalogue. It's the one rule that's non-negotiable.

Our selection charter · 3 pillars

01

Respect for people

  • All brands share the names of their partner workshops with us.
  • All of them commit to respecting the fundamental principles of the International Labour Organization.
  • When they manufacture in high-risk countries, we ask for additional guarantees and labels.
02

Care for the planet

  • 100% of the clothes we select are made from at least 90% organic, vegan, recycled or natural materials.
  • All brands give us proof, with labels and certifications: GOTS, OCS, Oeko-Tex, Bluesign…
03

Integrity and values

  • At least 75% of collections must be eco-friendly.
  • All of them commit to always doing better, never worse just to produce more.
View the full charter ↗

What our customers say

4.9 / 5
★★★★★ ★★★★★
20 verified reviews
5★ 18
4★ 1
3★ 1
2★ 0
1★ 0

Review summarybased on 20 reviews

This T-shirt wins people over with its exceptional softness and quality knit that keeps its shape. Comfortable and opaque, it has an elegant but fitted cut: feel free to size up for more room. A durable basic, highly recommended.

Translated from French

Automatic summary of verified reviews. May contain inaccuracies.

MT
Marine T.
Verified purchase
August 2025
★★★★★ ★★★★★ Size M · White

Incredibly soft material and true to size, I highly recommend++

Translated from French

MK
Maria K.
Verified purchase
July 2025
★★★★★ ★★★★★ Size M · Brown

Very comfortable, true to size, doesn't lose its shape.

Translated from French

LD
Léa D.
Verified purchase
June 2025
★★★★★ ★★★★★ Size M · Black

The knit is nice and tight and really good quality!

Translated from French

AR
Auréline R.
Verified purchase
June 2025
★★★★★ ★★★★★ Size XS · White

Very comfortable and nice fit

Translated from French

PM
Pamela M.
Verified purchase
June 2025
★★★★★ ★★★★★ Size XS · White

Incredibly soft cotton against the skin. The t-shirt doesn't lose its shape after washing. These are my favourite t-shirts!

Translated from French

NA
Niamh A.
Verified purchase
June 2025
★★★★★ ★★★★★ Size L · White

Quite close-fitting, go a size up. But otherwise great, I wear the top a lot and it holds up really well!

Translated from French

20 verified reviews

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Knowledge Cotton Apparel

// The brand

Knowledge Cotton Apparel

A Danish pioneer for more than 50 years, Knowledge Cotton Apparel puts sustainable innovation at the heart of its wardrobe. It uses only certified materials (GOTS, GRS) and is committed to full transparency, from the organic fibre to the finished garment.

Discover the brand

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Organic cotton ribbed T-shirt | blue "rib t-shirt malibu blue", Knowledge Cotton Apparel, photo 1
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Organic cotton ribbed T-shirt | blue "rib t-shirt malibu blue", Knowledge Cotton Apparel, photo 2
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Organic cotton ribbed T-shirt | blue "rib t-shirt malibu blue", Knowledge Cotton Apparel, photo 3
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Organic cotton ribbed T-shirt | blue "rib t-shirt malibu blue", Knowledge Cotton Apparel, photo 4
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Organic cotton ribbed T-shirt | blue "rib t-shirt malibu blue", Knowledge Cotton Apparel, photo 5

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