Country
Account

MASTER SHORT SLEEVE

For Those Who Live In Black T-Shirts

€54,99
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE

For People Who Live in Black T-Shirts

MASTER SHORT SLEEVE

€54,99

Engineered Heavy Cotton T-Shirt Tailored For Professionals. 

Built with Custom "LoftSoft" cotton technology to be "Seriously Soft" 

and still look vibrant after 30 washes

Engineered Heavy Cotton T-Shirt Tailored For Professionals. 

Title

"Invisible Cushioned Tubes" make the fabric "Seriously Soft"

260 gsm Heavy SUPIMA Cotton.

2-Ply that reduces wrinkling.
Title
Title
Size
Color
Quantity
Only 0 left
OUT OF STOCK
Restock February 26' PREORDER NOW
Restock February 26' PREORDER NOW

Restock February 26' PREORDER NOW

December 2025 (Friends & Family)

SOLD OUT

February 2026

NOW DELIVERING

May 2026

IN PRODUCTION

Pair Up & Save

Title
LOFT.SOFT™  COTTON TECH

standard fit - appropriate for mondays

anti-pilling/fading - black stays vibrant

science-backed comfort - incredible softness

flat-seamed stitching - seams that won't rub
Title

14-day money back guarantee

48-hour order processing
Title

Material Specs

  • Material Composition: 95% Cotton & 5% Spandex
  • Fabric Construction: Double Knit Construction
  • Fabric weight: 260 gsm
  • Heavy ribbed collar
  • Flatseams

Care Instructions

  • Machine wash cold
  • Tumble dry low
  • Do not dry clean
  • Do not bleach
  • This product has been professionally washed to minimize shrinkage

Video Explained By Founder

ENGINEERED APPAREL VS FAST FASHION

30X WASH COMPARISON   

The "Master Short Sleeve" is Engineered to 

Look Newer For Longer
Before
After 30 washes

Fast Fashion

Premium Heavyweight Cotton T-shirt

Before
After 30 washes

Kitwork 

MASTER Short Sleeve

Features

  • TAILORED FIT

  • FLAT-SEAMED STITCHING

  • LOFT.SOFT™ FABRIC

  • "STAY FLAT" COLLAR

Tailored Fit

Streamlined fit through the body

Natural shoulders

Complements all body types

Tailored Fit

Streamlined fit through the body

Natural shoulders

Complements all body types

Flattend Stitching

Flatlocked Seaming All Over

Zero-rubbing flat stitching

Inspired by protected baby-clothing

Flatlocked Seaming All Over

Zero-rubbing flat stitching

Inspired by protected baby-clothing

Flattend Stitching

Flatlocked Seaming All Over

Zero-rubbing flat stitching

Inspired by protected baby-clothing

Seriously Soft Heavy Cotton

260 gsm Heavy Cotton Fabric

SUPIMA Long Staple Cotton Prevents Fading 

"Cushion Tunnels" Create Unparalleled Bounce

Heavy Cotton

280 gsm Heavy Cotton Fabric

Supima Long Staple Cotton Prevents Fading 

"Cushion Tunnels" Create Unparalleled Bounce

Ribbed Collar

2x2 Ribbed Collar 

350 GSM Heavy Duty

Sleek Stitched

Ribbed Collar

2x2 Ribbed Collar 

350 GSM Heavy Duty

Sleek Stitched

What Makes the Master Short Sleeve Truly Different

REAL PROFESSIONALS THAT LOVE OUR PRODUCT

Trusted by repeat customers who consistently restock their wardrobe with it.

ENGINEERED 
EVERYDAY STAPLES

Luxury Raw Materials & Performance Innovation = Engineered Staples

Comfort For Flow State

This is your text block. Click to edit and make it your own. Share your

Comfort For Flow State

This is your text block. Click to edit and make it your own. Share your

Comfort For Flow State

This is your text block. Click to edit and make it your own. Share your

How We Engineered the Best Black T-Shirt in the World

ENGINEERED 
STAPLES FOR MONDAY

Luxury Raw Materials & Performance Innovation = Engineered Staples

Comfort For Flow State

Many of us do our best work in a black T-shirt—so it should help us slip into flow, not pull us out of it. We use a proprietary blend of material science and fabric engineering to create a fabric with an exceptionally smooth, calming sensory feel.

Our comfort and quality outperform anything in fast fashion.

Tailored To Wear On Weekdays

The Master Short Sleeve is intentionally tailored for weekdays—fitted to wear in the office, at a press conference, or on pitch day. The streamlined silhouette naturally follows your shoulders for a clean, professional look.

Slim-fit and oversized tees? Those are reserved for nightlife and weekends.

Black Color Should Stay Black

Once a black T-shirt fades, it’s no longer suitable for a professional setting.
That’s why we use the finest long-staple fibers to maximize color vibrancy and delay the onset of pilling, helping your tee stay richer and darker for longer.

Collar Should Stay Flat

The collar is the first detail people notice. A wrinkled collar instantly undermines an otherwise sharp outfit. We use a reinforced, thick ribbing construction to preserve the collar’s structure and prevent the dreaded “bacon collar.”

History of this development

History of this development

May 25' - July 25' - Final Specs 

Fabric Specs

- GSM = 260 

- Construction = Doubleknit **Redacted** (confidential)

- Yarn = **Redacted** (confidential)

- Finish = **Redacted** (confidential)

Garment Detail

- 2x2 Ribbed Collar 

- Flatlock seaming all over

- Zig-zag stitched label

Mar 25' - May 25' - Fabric Trial 3 & Garment Trial 3  

Request specifications

  • GSM = 250 
  • Construction = Doubleknit **Redacted** (confidential)
  • Yarn = **Redacted** (confidential) 
  • Finish = **Redacted** (confidential) --> revised

Brief: 

  • Heavyweight cotton with smooth handfeel
  • Heavyweight cotton with the bounciness of fleece
  • Heavyweight cotton protects from cold weather
  • Fabric still looks vibrant after 50 washes

Weartest feedback

  • Good Feedback
    • "Incredibly soft"
    • "Great drape"
    • "Color looks Dark!"
  • Points to improve
    • "Fabric feels slippery"

Jan 25' - Mar 25' - Fabric Trial 2 & Garment Trial 2 

Fabric Trial II - New specifications

  • GSM = 250 --> revised
  • Construction = Doubleknit **Redacted** (confidential)
  • Yarn = **Redacted** (confidential) --> revised
  • Finish = **Redacted** (confidential)

Fabric Trial II - Weartest feedback

  • Good Feedback
    • "Incredibly soft"
    • "Great drape"
    • "Color looks Dark!"
  • Points to improve
    • "Seams feel thick"
    • "Fabric feels slick, reminds me of a running t-shirt."

Nov 25' - Jan 25' - Fabric Trial 1 & Garment Trial 1 

Fabric Specs

- Raw Material = Supima Cotton

 

- Material Composition = 95% Cotton & 5 Spandex

- Weight = 270 gsm 

- Construction = Doubleknit **Redacted**  (confidential)

- Yarn = **Redacted** (confidential)

Why

- Maximize longetivity of color = Long Staple Fibers 

- Reduce pilling effect = Long Staple Fibers

- Some stretch for everyday comfort = 5% Spandex

- Structured Drape For Semi-formal aestethic + Suitable for Cold Climates = 250+ gsm

- Increase skin-side wearing comfort = Double-faced fabric 

- Maximize softness = **Redacted** (confidential)

Weartest Feedback

- "Drape feels quite formal, not casual."

- "The fabric feels super soft instantly."

- "The color is kind of gray-ish."

- "Collar has some waves" 
- "Seams feel very thick"

Our Thinking

- Right on brief. Weight is in a good range

- Right on brief. Tunnels create extra bounch/cushion in the fabric

- Improve the color depth. Should be blacker

- Body fabric is not suitable for a durable collar. Use ribbed fabric for collar

- Because fabric is heavy = thick. Normal seams are stacked so it it creates thick layers. Cannot reduce fabric weight, so must use different stitching method. 

Oct 25' - Nov 25' - Competitor Analyses 

Brand - Style

- "Zara" - Heavyweight T-Shirt 

- "Marco Polo" - Heavyweight T-Shirt

- "Uniqlo "- Airism Oversized T-Shirt

- "COS" - Mock Neck Heavy T-Shirt

- "ICON" Amsterdam - Heavy Weight T-Shirt

Insights

Fabric has good weight. Spandex unravels easily. Sizing = good

Fabric turns rough after washing 10x. Ribbed collar is interesting

Fabric includes polyester on the skin side = Not for the winter season

Fabric fades after 10 washes. Ribbed mock neck looks overly formal

Fabric deforms & fades after washing 5x. Sizing = too informal 
Title

"Everything about clothes bothers me. 
thick seams, cheap fabric, faded colors."

- Omar, Kitwork Co-founder- 
Title

4 Fabric
Iterations

Obsessed with finding the perfect balance between softness and durability.

10 Garment
Samples

Meticulous about shaping a tailored fit designed specifically for the office environment.

18 Months 
To Launch

Committed to building the right supply chain—because we're in this for the long haul.

"Everything about clothes bothers me. 
Thick Seams, cheap fabric, faded colors."

- Omar, Kitwork Co-founder- 

Title

4 Fabric
Iterations

Obsessed with finding the perfect balance 

between Soft/Durable

10 Garment
Samples

Meticulous about making the fit tailored for an office enviornment first

18 Months 
To Launch

Committed to building the right supply chain. We are in this for the long haul. 

YOUR QUESTIONS. ANSWERED

Have questions? We’re here to help

EMAIL:

team@kitwork.shop

Do you ship to the USA?

Yes. Prices adjust automatically based on U.S. duty and import tariffs.
When checking out, select “USA” as your shipping country and enter your address to see the final landed cost.

Why do you use "SUPIMA Cotton" vs "Common Cotton"?

Our goal was to create an engineered staple T-shirt that stays looking new for as long as possible—deep black, no fading, no pilling, and a smooth surface wash after wash.

To achieve this, we use Supima® cotton, one of the finest raw materials on Earth. Its exceptionally long fibers deliver richer color saturation, superior softness, and far greater resistance to pilling compared to common cotton.

Are your Duties & VAT included?

Yes, the checkout process includes all VAT and duties. 

What is your return policy?

We accept returns within 14 days of delivery.
Returned items must be unworn, unwashed, and include the original label.

To start a return, email us at team@kitwork.com, and we’ll send you the return form and instructions.

How long does it take to ship?

Orders are typically processed and shipped within 48–72 hours.
You’ll receive a shipping confirmation email as soon as your order is on its way.
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE
MASTER SHORT SLEEVE

MASTER SHORT SLEEVE

€54,99

Fast shipping

Orders processed within 48 hours.

Customer service

We personally answer emails and messages every day. We get a lot of emails so I try my best to respond within 12 hours.

Secure payment

Your payment information is processed securely.