What Is a Tech Pack — And Why Having One Isn't Enough

If you're preparing to manufacture a clothing product for the first time, you've probably heard the term "tech pack" thrown around a lot. Maybe a manufacturer asked you for one. Maybe you Googled it at 11pm trying to figure out what you've gotten yourself into.

Here's the straightforward answer — and then the part nobody talks about.

So, what is a tech pack?

A tech pack — short for technical package — is the document your manufacturer needs to produce your garment accurately. Think of it as a blueprint. It tells the factory exactly what to make, what materials to use, how to construct it, and how it should look when it's done.

A complete tech pack typically includes:

• Technical flat sketches — precise drawings of every seam, stitch, and design detail, front and back

• Bill of materials (BOM) — every fabric, trim, button, zipper, label, and packaging component

• Construction details — seam types, stitch types, facings, pockets, and finishing details

• Colorways — every color option, referenced by Pantone number or swatch

• Measurement specs — the exact measurements your sample maker uses to cut the first pattern

• Point of measure diagram — an industry-standard map of every measurement point on your garment

• Print, embroidery, and label specs — placement, size, color, application method

• Sample evaluation chart — a checklist you use to review your first sample against your specs

Without a tech pack, manufacturers are essentially guessing. And guessing leads to wrong samples, wasted money, and a lot of frustrating back-and-forth.

Most reputable manufacturers won't even take your order without one.

Okay, so I get a tech pack made. Problem solved, right?

Not quite — and this is the part that catches a lot of first-time founders off guard.

A tech pack is not a guarantee. It's a communication tool. And like any communication, what you intended to say and what the other person heard aren't always the same thing.

Here's what actually happens more often than you'd think: a founder gets a great tech pack made, sends it to their manufacturer, receives their first sample — and assumes everything is correct because they had a detailed tech pack.

That assumption is where things go wrong.

The mistake: not checking your sample against your tech pack

When your first sample arrives, the instinct is to try it on, look it over, and decide if you like it. That feels like the right move. But "liking it" and "it being correct" are two different things.

The first thing you should do when a sample arrives is pull out your tech pack and go through it line by line. Every single measurement. Every seam type. Every construction detail. Every label placement. Compare what you asked for against what you received — and note every single difference, no matter how small.

Why? Because manufacturers don't always follow the tech pack exactly. Sometimes it's an honest oversight. Sometimes it's a language or interpretation issue. And sometimes — and this is important — the manufacturer did what was easiest or most familiar to them, not what you specified.

Not every deviation is a problem — but you need to know why it happened

Here's where it gets nuanced. When you find a difference between your tech pack and your sample, the first step is to ask your manufacturer why they made that call.

Sometimes the answer is actually good news. An experienced manufacturer might have found a more efficient construction method that achieves the same result, or flagged a spec that wouldn't work well in production. That's valuable — that's the kind of expertise you want access to.

But sometimes the answer is less reassuring. Sometimes a seam was finished a certain way because it was faster. Sometimes a measurement is off because nobody double-checked. And if you don't catch it and ask, that deviation quietly becomes the new standard for your production run.

The sample evaluation chart included in your tech pack exists exactly for this reason. Use it every single time.

A quick checklist for when your first sample arrives

1. Set aside at least an hour — don't rush this

2. Get a soft tape measure

3. Open your tech pack to the measurement specs page

4. Measure every single point of measure on the sample and record it

5. Compare against your specs — note anything outside the tolerance range

6. Go through construction details — check every seam type, stitch, and finish

7. Check label placement, print placement, colorways

8. List every deviation — then contact your manufacturer and ask about each one

9. Decide which deviations need to be corrected and which are acceptable

10. Document everything in writing before approving the next round

The bottom line

A great tech pack gives you the best possible foundation for a successful production run. But it only works if you treat it as an active tool throughout the sampling process — not a document you hand over and forget about.

The founders who get great samples aren't just the ones with detailed tech packs. They're the ones who stay engaged, ask questions, and check everything.

That's not pessimism — that's just how manufacturing works. And knowing it upfront puts you miles ahead of most first-time founders.

Need a tech pack for your first production run? I'm Tatyana, a technical fashion designer with 10+ years of experience helping fashion startups go from idea to production-ready. Book a free discovery call and let's talk through what you're building