How to Write a Backpack Tech Pack: Template & Checklist

Every week our sales engineers receive a request that reads, in full: "Hi, I need 1,000 backpacks like the attached photo, please quote." The photo is a screenshot from a marketplace listing. There is no size, no fabric, no zipper spec, no logo file and no packing instruction. We can answer it - with a range so wide it is useless, or with fifteen questions the buyer did not expect to be asked.

A tech pack removes both problems. It is the document that turns "a backpack like this" into a product a factory can price in one pass, sample correctly the first time and reproduce identically in bulk. This guide explains what a backpack tech pack must contain, in the order a factory reads it, with the exact tables we use in our own sample room. A downloadable template follows the checklist at the end.

What Is a Tech Pack, and Why Does a Factory Insist on One?

A tech pack (technical package) is the complete specification of a product: what it looks like, how big it is, what it is made of, how it is built, how it is branded and how it is packed. For a backpack it typically runs 6-15 pages. It is not a design brief, a moodboard or a marketplace photo; those describe intent, a tech pack describes the object.

Factories insist on one for three reasons that all save the buyer money:

For the buyer the pack is also protection: it is the only evidence of what was agreed. Our private-label guide covers how the pack fits into the full development process; this article is about writing the pack itself.

What Are the Eight Sections of a Backpack Tech Pack?

Tech packs from apparel software often include sections a bag does not need (grading rules, fit comments by size) and omit ones a bag cannot do without (hardware BOM, webbing lengths, foam specifications). The structure below is the one we ask buyers to follow. Sections are in the order our pattern room reads them.

The following sections take each in turn.

Section 1: What Goes on the Cover Page?

The cover is the page a sales engineer reads to decide which line, which fabric supplier and which price band the product belongs to. It should answer in ten seconds what the rest of the pack answers in detail.

Two fields are skipped most often and cost the most: target price and quantity. A factory that knows the target can tell you on day one that 1680D and metal hardware will not land at USD 14.50, saving a sampling round.

Section 2: What Should the Technical Drawings Show?

Technical drawings (flats) are line drawings of the bag from every side, with every component labelled. They are not renders. A shaded 3D render shows what the bag looks like; a flat shows how it is built.

Required views

Callouts

Every component visible in the drawings gets a number, and that number appears in the BOM. This is the single practice that most reduces back-and-forth. "Zipper" is not a callout; "Z1 - main compartment, #10 nylon coil, two-way, 2 x SL-01 slider" is.

Drawings do not need to be produced in Illustrator. A clean pencil sketch photographed flat with legible callouts is better than a glossy render with none. What matters is that every panel edge, seam line and component is visible and labelled.

Section 3: How Do You Write a Measurement Spec for a Bag?

Bags are measured differently from garments. There is no body to fit; there is a set of points of measure (POM) on the finished, empty bag laid flat, plus a few taken with the bag stuffed to shape. The pack must say which.

Standard points of measure for a backpack

Two notes from the inspection table. Laptop sleeve dimensions (F) need a tighter tolerance than anything else: a 16-inch device that does not fit is a return, not a quibble. Volume (O) is the number most buyers quote in marketing and least often measure; if you will print "22 L" on a hang tag, put 22 L in the spec and we will test it.

Stating the tolerance

Every measurement needs a tolerance. Without one, a factory will assume +/- 1 cm and a buyer will assume exact, and the sample review becomes an argument. Tighter tolerances are possible but cost money: +/- 0.5 cm on all POMs roughly doubles the rejection rate at cutting and is rarely worth it outside device sleeves.

Section 4: How Do You Write the Bill of Materials?

The BOM lists every material and component in the bag, one row per item, with enough specification that a purchaser could buy it from a supplier who has never seen the bag. This is where most first tech packs fail: "600D polyester" is a fabric family, not a specification.

BOM template for a backpack

Material specifications that must not be left vague

Our fabric guide and hardware guide list the standard options for each row. If you do not know what to specify, write the requirement instead of the material - "must survive 5 kg daily load for 2 years" - and the factory will propose the specification for approval.

Section 5: How Do You Specify Colourways?

A colourway chart maps every BOM component to a colour, per SKU. Without one, "navy backpack" leaves open whether the zipper tape, the webbing, the lining, the binding and the logo thread are also navy, black or contrast - five decisions the factory will make for you and you will dislike at least one of.

Colourway chart template

Three rules. Reference colours by Pantone TCX (textile cotton, the standard for dyed fabric) or by an approved physical swatch, never by name or by a screen colour. Mark "DTM" (dye to match) only where an exact match to the body fabric matters; matching thread, zipper tape and webbing all DTM triples the number of dye lots and the cost. Keep shared components (base, hardware, lining) identical across colourways where you can; it is how three SKUs get the MOQ of one.

Section 6: What Construction Details Does the Factory Need?

Construction is how the pieces in the BOM become a bag. Two factories given the same BOM and drawings will build differently unless the pack says how. Construction notes need not be long; they need to cover the points where choices exist.

Construction specification checklist

The strap anchor line is the one to get right. It is the failure buyers see first, and it is decided entirely by construction, not by material. See How to Manufacture Custom Backpacks for the sewing sequence a pack should assume.

Section 7: How Should Branding and Labels Be Specified?

Branding is applied to flat panels before sewing, so its specification has to be complete before cutting starts. The pack must give the method, the artwork, the size, the position and the colour for every mark on the bag.

Branding specification table

Provide vector files (AI, EPS, SVG or PDF with outlined fonts). For embroidery, either provide a DST file or let the factory digitise once and approve the stitch-out; do not send a JPEG and expect it to embroider well. A 200 x 200 px logo screenshot is the most common single cause of a branding sample being rejected.

Labels required by law

Most markets require a fibre content label, a country of origin label and, for children's products, a tracking label. These are not branding, but they are labels the factory sews in and they belong in the pack:

Confirm the exact wording with your importer of record; the factory can supply reference label layouts from previous orders in your market.

Section 8: What Goes in the Packing Specification?

Packing is the last page of the pack and the first thing the receiving warehouse sees. Unspecified packing defaults to "one polybag per bag, 20 per carton, factory marks", which suits nobody exactly.

Packing specification template

Retail programmes will add a retail box, an insert card and a shelf-ready carton. Bulk and tender programmes may replace cartons with compressed bales to cut volume. Our manufacturing guide includes a container-loading table by packing format.

What Are the 15 Gaps That Delay a Quote?

We looked at the tech packs received over the past year and listed the gaps that generated a clarifying question before a quote could be sent. The fifteen below cover most of them.

A pack that closes all fifteen gets a firm quotation in one round. In our experience that is roughly one pack in ten on first submission; most of the other nine are complete after a single round of questions, which is still faster than sampling blind.

How Does the Factory Use the Tech Pack After the Quote?

The pack does not retire once the price is agreed. It becomes the working document for the next three stages.

The revision discipline matters. When the sample review changes something - a zipper length, a logo position - the pack is revised and re-issued, not annotated in an email. Bulk is built from the latest revision only.

Free Backpack Tech Pack Template

The tables in this article are the template. To use them:

1. Copy sections 1-8 into a spreadsheet, one sheet per section.
2. Number every component in your drawings and carry the numbers into the BOM, colourway and branding sheets.
3. Fill what you know; write the requirement where you do not know the specification.
4. Export as PDF, name it STYLE-NUMBER_RevA_DATE.pdf, and send it with the free sample request.

If you would rather start from our spreadsheet version, ask for it in the sample request and a sales engineer will send the file with example rows filled in.

Frequently Asked Questions

Do I need a tech pack to get a quote?

No, but without one the quote is a range. A complete pack gets a firm price in one round; a photo gets fifteen questions first. Most buyers save a week by writing the pack.

Can the factory write the tech pack for me?

Yes. Send a reference sample or detailed sketch with your target price and quantity, and the sample room drafts the pack as part of development. You review and approve it before sampling. This is the normal route for brands without an in-house product developer.

What software do I need?

None in particular. Adobe Illustrator is common for drawings; a spreadsheet for the BOM and measurements; the export is a PDF. A clean pencil flat photographed with legible callouts is acceptable.

How detailed does the fabric specification need to be?

Denier in both directions, coating type and number of passes, weight in gsm, finish, and a Pantone TCX colour reference. "600D polyester" alone is a family, not a specification.

What is a point of measure?

A defined location on the bag where a dimension is taken, with a code, a method and a tolerance. A backpack typically has 12-16. They are what the QC inspector measures on bulk.

How do I specify a zipper properly?

Gauge (#5, #8, #10), chain type (nylon coil, moulded vislon, metal), one- or two-way, open- or closed-end, length, tape colour, slider type and finish, puller type. See the hardware guide for standard options.

What file format should my logo be in?

Vector: AI, EPS, SVG or PDF with fonts outlined. For embroidery, also a DST file or let the factory digitise once. A JPEG or PNG cannot be used for production.

What is a golden sample?

The approved pre-production sample, sealed and signed by both parties. Bulk is inspected against it and against the final revision of the pack together.

How many revisions is normal?

Two to three: Rev A (initial), Rev B (after quote questions), Rev C (after sample review). More than four usually means the target price or design was not settled before sampling.

Should the pack include the sewing sequence?

Not usually; the factory owns the sequence. It should include the construction points where choices exist - seam types, stitch density, bartacks, anchor construction - which is what the construction table covers.

Can one tech pack cover three colourways?

Yes. The colourway chart maps components to colours per SKU; everything else is shared. That is how three colours share one set of patterns and one MOQ conversation.

How long does it take to write?

For a first backpack, one to two working days with the template. Reusing a previous style's pack as the base cuts it to hours.