What Is a Tech Pack and Why Factories Reject Yours

A founder sent us their "tech pack" last month. It was a Pinterest board, three iPhone photos of a hoodie they liked, and a Word doc that said "make it heavier than Essentials." The factory ghosted them in two days.

This happens constantly. Tech packs are the single biggest reason new brands get rejected, ignored, or quoted insane prices by factories. And almost nobody explains what one actually needs to contain, or what it doesn't.

What is a tech pack, exactly

A tech pack is the technical blueprint a factory uses to produce your garment. It includes flat sketches, measurements, fabric specs, trim details, labeling, and construction notes. Without it, a factory cannot quote you accurately, sample correctly, or produce at scale.

Think of it like architectural plans. You wouldn't hand a contractor a photo of a house and say "build this." Same logic. The factory needs the core details spelled out before they touch a machine.

A real tech pack is usually 6 to 15 pages per garment. Yes, per garment. A 5 piece collection means 5 separate tech packs.

Why factories actually need one

Factories run on precision. A pattern maker, a fabric cutter, a sewer, and a QC person all need to read the same document and reach the same result. If there's ambiguity on the important stuff, the garment comes out wrong.

Here's what most founders miss. The factory doesn't know your brand. They don't know your taste. They don't know that you wanted the hem raw, not finished. If it's not in the tech pack, they'll default to whatever's standard for them.

That default might be fine. Or it might be the opposite of what you imagined. The tech pack is how you remove that gamble.

What goes inside a real tech pack

A complete tech pack has roughly six core sections. Skip one and you'll feel it during sampling.

1. Cover sheet and style summary

Brand name, style name, season, designer, date, and a clean front and back flat sketch. This is the at a glance reference everyone on the factory floor uses.

2. Flat sketches with callouts

Technical drawings of the garment from front, back, and any necessary side views. Every seam, pocket, label, drawcord, and notable construction detail is labeled with a callout pointing to its exact location.

These are not fashion illustrations. They're technical line drawings. Adobe Illustrator is the industry standard.

3. Measurements (graded spec sheet)

A measurement chart in inches or centimeters, across every size you plan to produce. Body length, chest width, sleeve length, armhole, cuff width, neck drop, and so on. Usually 10 to 25 points of measure depending on the garment.

This is where most founders fail. They list 5 measurements and expect the factory to invent the rest. The factory will invent them, and you might not love what you get.

4. Bill of materials (BOM)

The components in the garment, with the level of spec you actually have. Main fabric (composition and weight), trims, drawcord, zipper type, label, hangtag.

A note that matters here. If you're working with a full package factory, you usually don't need to source your own fabric or list specific suppliers. They have mills they already work with. Your job is to specify the type of fabric you want, the weight, the composition, and the hand feel. They'll bring you swatches from their network. This is one of the biggest misconceptions new founders have. You're not sourcing materials, you're specifying them.

5. Construction details (the ones that matter)

This is where founders overdo it or underdo it.

You don't need to specify stitches per inch, exact seam allowances, or which industrial machine to use. The factory knows their machines better than you do. What you do need to flag are the visible construction choices that affect the look of the garment.

Is the hem raw, folded, or finished with binding? Is the neckline ribbed, banded, or bound? Are the seams flat or topstitched? Is there a contrast stitch color? Is the zipper exposed or hidden behind a placket?

Anything the customer will see or feel needs a note. Anything that's purely internal machine choice, leave to the factory.

6. Labeling, branding, and packaging

Main label placement, care label content, size label, hangtag specs, woven patches, embroidery files, screen print Pantone codes. Folding instructions and polybag preferences if you have them.

Anything visible to your customer that isn't fabric belongs in this section.

The reasons factories reject your tech pack

After years of watching brands get bounced back, the patterns are clear.

1. Reference photos instead of flat sketches

Pinterest boards are not tech packs. Photos of other brands' garments are not tech packs. Factories cannot reverse engineer a hoodie from an Instagram screenshot, even if it's a really good screenshot.

You can absolutely include reference photos as supporting context, that's helpful. But they sit alongside flat sketches, not in place of them.

2. Missing measurements

Sending a tech pack with only chest and length measurements is the fastest way to get ignored or quoted high. The factory will either ask you to redo it, or pad the quote because they have to fill in the gaps themselves.

A real spec sheet has measurements for every relevant point on the garment, across every size.

3. Vague fabric direction

"Heavyweight cotton" means nothing. "Heavyweight French terry, around 380 to 420 GSM, 100% combed cotton, brushed back interior, soft hand feel" means something.

You don't need to name a specific mill or supplier, the factory will source from their network. But you do need to give them enough detail to bring back the right swatches.

4. No graded measurements

A graded spec sheet shows how the garment changes across sizes. Small to medium to large to XL. If you only give the medium, the factory has to grade it themselves, which adds time and risk.

Some factories will grade for you as part of sampling. Others won't. Either way, having your own grading guidelines is better than leaving it to chance.

5. Inconsistent or messy formatting

Mixing inches and centimeters within the same document. Misspelled fabric names. Missing page numbers. Different fonts on every page. This signals to the factory that you're not serious.

Presentation matters. A clean, professional tech pack opens doors that a messy one slams shut.

6. No callouts on visible details

You can have perfect sketches and perfect measurements, and still get a sample that looks wrong if you don't flag the visible details. Hem finish, neckline construction, contrast stitching, label placement, drawcord material.

Factories will default to whatever is standard for them if you don't tell them otherwise. Standard is often fine. Sometimes it's not.

7. No tech pack at all

More common than you'd think. Founders email factories with "I want to make hoodies, can you send me a quote?" and expect a response. Most factories won't open the email. The ones that do will send you a generic price list or ghost you.

No tech pack, no quote. That's the rule.

What a strong tech pack actually unlocks

Here's the part nobody tells you. A great tech pack doesn't just help you get sampled correctly. It changes which factories will even work with you in the first place.

Top tier factories, the ones producing for the brands you actually admire, filter incoming clients by tech pack quality. A clean, professional file tells them you're a real brand with real production plans. A messy file tells them you're a hobbyist who will waste their time.

This matters a lot when you're trying to find a clothing manufacturer that fits your brand. The better your documentation, the higher the tier of factory that will even respond to your inquiry. We've watched the exact same product get rejected by 4 factories and accepted by 3 better ones just by improving the tech pack.

Quotes also get sharper. When a factory can see every detail, they don't pad the price to cover unknowns. We've seen founders cut their per unit cost by 15 to 20% just by tightening their tech pack before requesting quotes.

How to actually get a tech pack made

You have three real options.

Option 1: Do it yourself

Possible if you have a design or apparel background. You need Adobe Illustrator, a working knowledge of garment construction, and access to measurement references. There are templates online, but the learning curve is steep.

Realistic timeline: 2 to 4 weeks per garment for someone who's never done it before.

Option 2: Hire a freelance tech designer

This is what most serious founders do. A freelance tech designer or apparel consultant builds your tech pack from your concept, sketches, and reference garments. Cost ranges from $300 to $1,200 per style depending on complexity.

This is where Entreupia's Pro Partners come in. These are vetted apparel consultants and tech designers who have built tech packs for real production. If you're stuck between Pinterest and a factory, this is the bridge.

Option 3: Use the factory's in house tech designer

Many full package factories will build or refine the tech pack for you as part of the sampling process. The catch is that they're building it to their workflow, which can limit your ability to switch factories later. It's the cheapest path upfront but the most expensive if you ever need to move production.

What nobody tells you about tech packs

Here's the spicy part. Most tech packs in circulation are mediocre. Even some from "professional" agencies.

A truly good tech pack focuses on the right details and skips the wrong ones. It nails the things only you know (the look, the fit, the visible construction choices) and trusts the factory on the things they do every day (machine choice, internal stitch tension, seam allowance norms).

Founders who overspec everything come across as inexperienced. Founders who underspec everything come across as unprepared. The sweet spot is knowing what to control and what to release.

The brands you admire know this. Fear of God, Aimé Leon Dore, Stüssy. Their tech packs are precise where it matters and minimal where it doesn't. That's the level you're aiming for.

What to do next

Before you contact a single factory, build a real tech pack. Or get someone to build one for you. This is the move that separates founders who get taken seriously from founders who get ignored.

If you already have a tech pack and you're not sure if it's ready, get a second set of eyes on it. A bad tech pack will cost you months and thousands of dollars in failed samples. That's exactly what our Factory Match Preview is built for. Send us your file and we'll tell you if it's production ready, what's missing, and what kind of factory matches you'd realistically get with it.

Once your file is tight, the next step is understanding how sampling actually works and what to expect from your first prototype. Because even with a perfect tech pack, your first sample will surprise you. That's normal.

The tech pack is the foundation. Everything else, sampling, bulk, quality, consistency, all of it sits on top.

Get this part right and the rest gets easier.