Direct answer: A tech pack is the complete technical document that tells a factory exactly how to produce your garment or product. It includes flat drawings, measurements, materials, construction notes, colourways, labels, and packaging specifications. Without one, factories cannot give you an accurate quote or begin sampling. With a good one, you can reduce your sampling rounds significantly and get your product to market faster.
What is a tech pack?
A tech pack, short for technical package, is the master document that bridges your creative vision and the factory floor. Think of it as the instruction manual for your product. Every measurement, every material choice, every stitch type, every label placement lives inside it. When a factory production manager or technical team receives your tech pack, they should be able to produce your garment accurately without ever speaking to you directly.
This is what makes a tech pack so different from a mood board or a sketch. A sketch communicates your aesthetic intention. A mood board conveys your brand feeling. Both are valuable in the early creative stages, and I use both myself when I am developing new products. But neither tells a factory what to make. A factory needs to know the precise hip measurement at size 12, the exact Pantone reference for your colourway, whether the zipper is nylon or metal, the thread colour code, and how the care label should be positioned. That level of detail lives only in a tech pack.
I have been producing fashion and lifestyle products for over twenty years, including silk scarves for the V&A Museum, merchandise for Chatsworth House, and licensed collections for iconic estates including those of David Bowie and Jimi Hendrix. In every single one of those projects, a thorough tech pack was the foundation that made accurate production possible. When the stakes are high, and when your brand reputation is on the line, there is no room for ambiguity.
For a broader understanding of the UK fashion manufacturing landscape and what factories expect from brands at different stages, the British Fashion Council publishes guidance that is worth reading alongside this article.
What does a complete tech pack contain?
A complete tech pack is made up of several distinct components, each serving a specific purpose for the factory. Many founders are surprised by how many sections a professional tech pack includes. Here is a breakdown of every component, what each one should contain, why factories need it, and the mistakes I most commonly see.
| Component | What It Includes | Why Factories Need It | Common Mistakes |
|---|---|---|---|
| Technical flat sketch | Front, back, and detail views drawn to scale with callouts | Gives the pattern cutter a precise visual reference for every seam, panel, and design feature | Using a mood board sketch or photo reference instead of a clean flat |
| Measurements and grading | A full size spec sheet for every size in your range, with tolerances | Allows the factory to cut and grade accurately to your customer’s body | Providing only one size, or using vague terms like “standard UK sizing” |
| Materials and trim list | Fabric name, composition, weight, supplier code, and all trims with codes | Enables the sourcing team to procure the exact materials you specified | Saying “cream linen” with no weight or supplier reference |
| Colourway specs | Pantone TPX or TPG codes for every colourway in every material | Prevents colour drift between samples and production runs | Sending a photo or a paint chip instead of a calibrated Pantone reference |
| Construction notes | Seam allowances, stitch types, stitch density, finishing details | Tells the machinist how to build the garment, not just what it looks like | Omitting seam allowances or leaving construction methods open to interpretation |
| Label and packaging spec | Care label content, brand label placement, swing tag, and poly bag or box spec | Ensures your product leaves the factory compliant and on-brand | Forgetting label placement diagrams, or leaving out care symbols required by UK law |
| Revision history | A log of every change made between versions with dates | Prevents the factory from working from an outdated version of the document | Having no version control, so the factory produces from an older spec |
Each of these sections protects you as much as it helps the factory. If a sample comes back with the wrong hem stitch, and your tech pack specifies the correct one, you have clear grounds for a re-sample at the factory’s cost. If your tech pack is vague, you have no recourse.
Do I need a technical designer to create a tech pack?
This is one of the questions I am asked most often, and my honest answer is: not necessarily, but you do need the right tools and knowledge.
A professional technical designer brings speed, precision, and expertise that is genuinely valuable, especially for complex garments or if you are producing at scale. But I have worked with founders at every stage of their journey, and I know that many brilliant, motivated people create perfectly serviceable first tech packs themselves when they have a solid template and understand what factories are looking for.
I have made a free tech brief template available at /resources precisely because I want to lower the barrier to getting started. Download it, work through it section by section, and you will quickly see which areas you feel confident completing and which areas you need support with.
Here is what I have observed over more than twenty years of working with factories across the UK and Europe: the founders who come to me with even a basic tech pack, however imperfect, get quotes 30 to 50 percent faster and more accurately than those who come with sketches alone. That is not a small advantage. A faster, more accurate quote means you can make better financial decisions sooner. It means less back-and-forth with the factory in the early stages. It means you start the sampling process from a shared understanding rather than from guesswork.
If you are at the stage where you want to learn more about what the full product development journey looks like, my Founder’s Q&A page answers many of the questions I hear most frequently.
How do tech packs affect your sampling costs?
Sampling is one of the most significant costs in early product development, both in money and in time. Each sampling round requires the factory to cut fabric, source trims, run machinery, and pay skilled workers. Those costs are passed to you. A poorly specified product can go through three, four, or even five rounds of sampling before it is right. A well-written tech pack typically reduces that to one or two rounds.
To put that in practical terms: if your sampling cost is £400 per round and you go through four rounds because your specs were unclear, you have spent £1,600 reaching a result that a thorough tech pack might have achieved for £800. That is money that belongs in your marketing budget, your next collection, or your working capital.
There is also a time cost. Each sampling round can take four to eight weeks depending on your factory’s capacity and location. Three extra rounds can add three to six months to your launch timeline. In a competitive market, that delay has real commercial consequences.
The British Standards Institution publishes standards for garment sizing and labelling that are useful background reading if you want to understand the technical expectations factories work to.
If you have questions about sampling timelines or how to interpret a sample from a factory, visit my Founder’s Q&A where I cover those topics in detail.
What is the difference between a tech pack and a sample brief?
These two documents are often confused, and understanding the difference will help you know which one you need at each stage of your project.
A sample brief is a shorter, earlier document. It communicates your design intent to help a factory or technician understand what you want to create before a full tech pack is developed. A sample brief typically includes a sketch or reference images, a rough description of materials, an indication of the silhouette and key details, and your target price point. It is a starting point for a conversation.
A tech pack is the definitive, production-ready specification. It is created after the design is resolved, and it contains everything a factory needs to produce the garment accurately, repeatedly, and at scale.
In my BuildTheDreamBrand Method, I work with founders through both stages: first clarifying the design intent through a sample brief, then developing the full tech pack once the creative decisions are made. Trying to skip straight to a tech pack when the design is still evolving can lead to expensive revisions, so understanding which document you need at which moment is genuinely important.
What makes a great tech pack?
Rather than listing what goes wrong, I want to frame this positively, because a great tech pack is something to be proud of. It is a professional document that represents your brand and your product with clarity and confidence. Here is what the best tech packs I have seen all have in common.
First, they include a complete size specification for every size in the range. Not just a sample size. Every size, with graded measurements and tolerances clearly stated. This tells the factory precisely where you want each measurement to land and how much variation is acceptable.
Second, they use calibrated colour references. Pantone TPX (for textiles) or TPG (for paper and print) codes are the industry standard. A photo of your inspiration, a paint swatch, or a description like “dusty rose” is not sufficient. Colour looks different on different monitors, in different light, and on different substrates. Pantone codes remove that ambiguity entirely.
Third, they include a label specification. This means the care label content (fibre composition, washing instructions, country of origin), the brand label placement with measurements to seam edges, and any swing tag or packaging requirements. In the UK, care labelling requirements are governed by the Textile Products (Labelling and Fibre Composition) Regulations 2012, which you can read on GOV.UK.
Fourth, they have a clear version number on every page. If you send your factory an updated tech pack, every page of the new version should carry the new version number and date. This prevents the factory from accidentally producing from an older version.
When should you ask a professional to create your tech pack?
There are moments in a founder’s journey when investing in professional technical support is the right decision, and I want to help you recognise them.
If your product is technically complex, for example if it involves structured tailoring, swimwear, or activewear with performance specifications, professional technical design is worth the investment. The consequences of an inaccurate tech pack in those categories are expensive.
If you are approaching a factory for the first time and you want to make a strong professional impression, a polished tech pack signals that you are a serious brand worth working with. Factories are businesses. They choose their customers too. Arriving with a professional specification tells them you understand the process and will be straightforward to work with.
If you have already been through two or more sampling rounds and the product is still not right, it is often the tech pack that needs attention, not the factory. That is a moment when outside expertise can save you significant time and money.
My design and sampling service is designed precisely for these moments. I work with founders to develop accurate, factory-ready technical documentation that gives your product the best possible start.
Ready to take your next step?
Whether you are just beginning to think about production or you are already in conversation with factories, the right documentation makes everything easier. Download the free tech brief template from my resources page to get started, and if you would like to discuss your specific project, I would love to hear from you on my contact page.
The product development journey has many steps, and each one builds on the last. A strong tech pack is not just a factory requirement. It is a creative and commercial asset that protects your vision from sketch to shelf.