What Is a Tech Pack? The Complete Guide for Clothing Brand Founders

If you're planning to design & produce your own clothing collection, you will very quickly come across the term "tech pack", and understanding exactly what it is, why it matters, and how to build one properly is essential before you approach any manufacturer.

A tech pack is not an optional extra or a nice-to-have design document, it is the foundation that every cut & sew production order is built upon. Get it wrong, and you'll pay for it in failed samples, wasted time & inflated costs. Get it right, and you give your brand the best possible chance of receiving a garment that actually matches your vision.

In this guide we break down exactly what a tech pack is, what it must include, who uses it, how to build one, and the most common mistakes founders make when creating their first one.

1. WHAT IS A TECH PACK, EXACTLY?

A tech pack (short for technical package) is a detailed document containing every piece of technical information a factory needs in order to manufacture a garment accurately, without ever needing to ask you a clarifying question.

Think of it as the instruction manual for your garment. It removes guesswork from the production process by translating your creative vision into a language that a pattern maker, sample machinist or overseas factory can interpret exactly the same way, regardless of where in the world they're based or what language they speak.

A tech pack is typically built as one document per style, with each page communicating a different layer of technical detail, from the flat sketch through to the exact stitch type used on a seam.

It's worth noting that a tech pack is different from a spec sheet, although the terms are sometimes used interchangeably. A spec sheet usually refers specifically to the measurement page within a tech pack, whereas the tech pack itself is the complete document covering design, construction, materials & compliance details for that garment.

2. WHY YOUR BRAND NEEDS ONE

Every stage of garment production, from costing & sampling through to bulk manufacturing, depends on your factory correctly understanding what you're asking them to build. Without a tech pack, this understanding is left to interpretation, and interpretation is where expensive mistakes happen.

We covered this in our article on Cut & Sew vs. Print On Blank, poor quality tech packs are one of the leading causes of costly sampling mistakes and drawn out production timelines for cut & sew brands. A single missing measurement or unclear construction note can mean multiple rounds of sample revisions, each one costing you both money & precious time before a collection launch.

Beyond avoiding mistakes, a strong tech pack also protects your brand in a few other important ways :

Consistency across production runs : If you reorder a bestseller months later, or move to a new factory, the tech pack ensures the garment is reproduced exactly as originally intended.

Accurate costing : Factories need full technical detail in order to quote you accurately, vague or incomplete information typically results in inflated or inaccurate cost estimates.

Quality control reference : Your QC checklist during production should be measured directly against the tech pack, without it, you have no objective standard to hold the factory accountable to.

Faster factory onboarding : A professional tech pack signals to a manufacturer that you understand the process, which often results in being taken more seriously & receiving better service, particularly at low MOQs.

3. WHAT'S INCLUDED IN A TECH PACK

A complete tech pack is made up of several distinct sections, each communicating a different layer of information the factory needs.

Style Overview / Cover Page

The front page of each style's tech pack, including the style name & number, season, brand name, a short design description & a reference image or mood image of the garment concept.

Technical Flat Sketches (CADs)

Flat, proportionally accurate line drawings of the garment shown from the front & back (and sometimes side), without a body inside them. These are not fashion illustrations, they are technical drawings intended to show every seam, stitch line, pocket, closure & design detail clearly & accurately.

Measurement Specification (Points of Measure)

Often referred to as the "spec sheet" or POM (points of measure), this page lists every key measurement of the garment in a base size, such as chest width, body length, sleeve length, hem width & so on, along with acceptable tolerance for each measurement (the small margin of allowable variance during production).

Grading

Grading takes the base size measurement spec and calculates how each measurement should increase or decrease across your full size range, ensuring consistent fit & proportion from your smallest to largest size offering.

Bill of Materials (BOM)

A full list of every material used to construct the garment, including fabric composition & weight (GSM), all trims such as zippers, buttons, drawcords & elastic, and any interfacing or lining. Each material should reference an approved supplier & article code where possible.

Colourways

A breakdown of every colour combination the style will be produced in, including exact fabric colour references (such as Pantone codes) for each colourway.

Construction & Stitch Details

Detailed notes on how the garment should physically be built, seam types, stitch per inch, seam allowance, thread colour, and any specific construction techniques required.

Embellishment / Graphic Placement

Precise placement, scale & positioning of any graphic print, embroidery or other embellishment, referencing our article on Graphic Print Methods for guidance on choosing the right method for the desired result.

Labelling & Packaging

Placement & specification for neck labels, garment spec labels & any hang tags, along with folding & packaging instructions. This section should always reflect the legal labelling requirements relevant to the markets you intend to sell in.

Revision History

A running log of any changes made to the tech pack throughout the sampling process, dated & noted clearly, so both you and the factory are always working from the most current version.

4. WHO ACTUALLY USES A TECH PACK

A tech pack is referenced by multiple people throughout the life of a single style, which is exactly why it needs to be unambiguous & complete.

Your pattern maker uses it to draft the initial pattern & translate your measurement spec into a physical block. Your factory's sample machinist uses it to construct the first physical sample of the garment. Merchandisers & production teams overseas use it to cost, plan materials & schedule production. Quality control staff, whether that's the factory's own team or your own, use it as the benchmark to inspect finished garments against. And internally, your own design & production team should be referring back to it throughout development to track decisions & changes.

5. HOW TO CREATE A TECH PACK

Building a tech pack is a layered process, and it's rarely finished in one sitting, it typically evolves alongside your design & sampling process. A practical approach looks like this :

Finalise your design concept and produce clean, proportionally accurate flat sketches for front & back views.

Draft your initial measurement specification, either by taking a well fitting reference garment and measuring it flat, or by working with a pattern maker to build a spec from scratch.

Confirm your fabric, trims & materials, and document exact composition, weight & supplier references in your bill of materials.

Add full construction detail, including seam types, stitching & any specific techniques the factory needs to replicate.

Include labelling, packaging & compliance information relevant to your target market.

Send the completed tech pack to your chosen factory for costing & sample development, and use the revision history to track any changes requested after reviewing the first sample.

Most brands build their tech packs using design software such as Adobe Illustrator or Photoshop for the flat sketches, combined with a spreadsheet or dedicated tech pack platform for the measurement specification & bill of materials. There are also specialised tech pack software platforms available which combine all of these elements into one connected document, which can be a worthwhile investment as your style count grows.

If you're not confident building technical flats or measurement specs yourself, working with a garment technologist or a studio experienced in technical development is generally a far safer option than sending an incomplete tech pack and hoping the factory fills in the gaps, they usually won't, or they'll make assumptions that don't match your intention.

6. TECH PACKS FOR PRINT ON BLANK VS. CUT & SEW

The depth of tech pack you need depends heavily on your production method.

If you're working with print on blank production, your garment construction, fit & materials are already fixed by the blank supplier, so your tech pack requirement is much lighter. In this case, you mainly need a clear placement sheet detailing embellishment size, position & colour for each garment & size, along with labelling specification.

If you're producing cut & sew, a full tech pack covering every section outlined above is essential. Every construction decision is being made from scratch, so there is no fallback specification for the factory to rely on if your documentation is incomplete.

7. COMMON TECH PACK MISTAKES THAT COST YOU TIME & MONEY

Missing tolerance ranges on measurements, leaving the factory to decide how much variance is acceptable, which often differs from your expectation.

Inconsistent units, mixing centimetres & inches across different pages of the same tech pack, causing confusion during pattern drafting.

Vague construction notes, such as "standard seam" without specifying seam type, allowance or stitch detail.

No revision history, making it unclear which version of the spec the factory is currently working from, particularly after multiple sample rounds.

Skipping the labelling & compliance section entirely, only to discover the requirement once bulk garments have already been produced.

Relying on the factory to make design decisions you haven't specified, factories will typically make the fastest, cheapest choice available to them, not necessarily the one that matches your brand vision.

8. FREQUENTLY ASKED QUESTIONS

Do I need a tech pack if I'm using print on demand or blanks?

You still need a lightweight version covering placement, sizing & labelling, but you don't need the full construction, pattern & materials documentation required for cut & sew, as this is already determined by the blank supplier.

How many pages should a tech pack have?

This varies by garment complexity, a simple t-shirt might only need 4-6 pages, while a technical outerwear piece with multiple components could run to 15-20 pages or more.

Can I build my own tech pack without a fashion design background?

For simple styles, yes, with some research & care this is achievable. For more complex garments, working with a pattern maker or garment technologist is strongly recommended, as small technical errors are very difficult to catch without production experience.

Should measurements be in metric or imperial?

This depends on your factory, many international factories work comfortably in centimetres, though some, particularly in certain regions, prefer inches. Always confirm with your specific manufacturer & keep the unit consistent throughout the entire document.

Does a tech pack replace the need for a physical sample?

No, a tech pack guides the creation of your sample, it doesn't replace it. You should always review & fit-test a physical sample against your tech pack before approving bulk production, as certain details are very difficult to fully judge on paper alone.

How much does a professionally made tech pack cost?

Pricing varies considerably depending on garment complexity, the number of styles & the experience level of who's producing it, so it's always worth requesting a quote based on your specific collection rather than relying on a generic figure.

CONCLUSION

A tech pack is one of the most important documents your brand will ever produce, it is the difference between a factory guessing at your intention and a factory executing it accurately. Treat it as a living, evolving document throughout your sampling process, not a one-time task to rush through before sending your first order.

Investing the time to build it properly, or working with an experienced studio to develop it for you, will save you far more in avoided sample revisions, delays & production errors than it costs to get right the first time.

If you're interested in starting a clothing brand, get in touch with us for a free project consultation where we will guide you through the development process.

Disclaimer : All information in this article is for the purpose of education only, this is not business advice and Rudiment Atelier holds no responsibility or liability for your personal or business decisions.