What Is a Tech Pack and Why Apparel Manufacturers Need One ZOOKS Guide
A garment can look simple on a hanger, but it may involve dozens of production decisions before it reaches a cutting table. A small change in GSM, stitch type, label placement, or sleeve length can change the final product.
That is why manufacturers ask for a tech pack before sampling or bulk production. It gives the factory a clear, written reference for how the garment should be made, measured, finished, packed, and checked.
For clothing brands, fashion startups, designers, and procurement teams, a good tech pack is not just a design file. It is a production document that reduces guesswork and helps both sides work with the same expectations.
What an apparel tech pack is
An apparel tech pack is a detailed document that explains how a garment should be made. It is usually created by the brand, designer, product development team, or technical designer and shared with the manufacturer.
Think of it as the garment’s instruction manual.
It helps the manufacturer understand:
What the garment should look like
Which fabric and trims to use
How each part should be measured
How the garment should be stitched and finished
Where prints, embroidery, labels, and accessories should be placed
What quality standards the final product must meet
A tech pack may be prepared in PDF, Excel, Adobe Illustrator, or product lifecycle management software. The format matters less than the clarity of the information.
For example, telling a factory “make a heavyweight oversized T-shirt” is not enough. One buyer may define heavyweight as 220 GSM, another may mean 260 GSM. “Oversized” may mean a 4 cm drop shoulder for one brand and 8 cm for another.
A tech pack removes that uncertainty.
Why tech packs matter in clothing manufacturing
Manufacturers can produce better results when they receive complete information. Without a tech pack, production teams must make assumptions. Those assumptions can lead to wrong samples, repeated corrections, delays, and disputes over what was approved.
A tech pack helps in several practical ways.
It reduces production errors
Clear specifications reduce the chances of common mistakes, such as:
Incorrect garment measurements
Wrong fabric weight or composition
Print placed too high, too low, or in the wrong size
Mismatched thread colour
Missing labels or trims
Incorrect seam finishing
Poor fit across sizes
The goal is not to create paperwork for the sake of it. The goal is to give the sampling master, pattern maker, cutting team, stitching operator, printing team, and quality checker the same reference.
It improves communication
Many brands work with manufacturers across cities, states, or countries. A tech pack creates a common language between design and production teams.
Instead of long message threads saying “make the neck slightly wider”, the tech pack can specify:
Neck width
Neck drop
Rib width
Seam allowance
Tolerance range
That level of detail helps prevent confusion.
It helps manufacturers quote accurately
A manufacturer cannot give a reliable price without knowing what needs to be made.
A detailed tech pack helps the factory estimate:
Fabric consumption
Fabric cost based on GSM and composition
Trim and label cost
Printing or embroidery cost
Stitching complexity
Sampling effort
Labour time
Wastage and production planning
Packing requirements
For example, a basic crew neck T-shirt and a panelled T-shirt with contrast stitching, sleeve embroidery, neck tape, and custom packaging will not cost the same. The tech pack helps the manufacturer identify those differences early.
ZOOKS, as a custom and bulk apparel manufacturer, uses tech pack details to review feasibility, estimate production requirements, and guide brands from sampling to bulk manufacturing with fewer surprises.
What a tech pack should include
A strong tech pack is detailed but easy to read. It should give enough information for a manufacturer to make the garment without repeatedly asking basic production questions.
Design sketches and garment views
Start with clear sketches or technical drawings. These should show the garment from different angles.
Include:
Front view
Back view
Side view if needed
Inside details if relevant
Close-up detail views for pockets, plackets, zippers, cuffs, collars, or panels
Flat sketches are more useful than styled fashion illustrations because they show construction more clearly.
For example, a hoodie sketch should show the hood shape, drawcord position, kangaroo pocket, rib cuffs, hem rib, seams, and stitch lines.
Fabric details and GSM
Fabric selection affects cost, fit, comfort, shrinkage, print quality, and durability. The tech pack should describe the fabric clearly.
Include:
Fabric type, such as single jersey, fleece, pique, poplin, twill, rib, interlock, or French terry
Fabric composition, such as 100% cotton or cotton-polyester blend
GSM, such as 180 GSM, 240 GSM, or 320 GSM
Fabric finish, such as bio-wash, enzyme wash, brushed fleece, or mercerised finish
Stretch requirement, if applicable
Shrinkage expectations, if known
GSM stands for grams per square metre. It tells the manufacturer the fabric weight. A 180 GSM T-shirt fabric will feel different from a 240 GSM fabric, even if both are cotton.
If the brand has a reference fabric swatch, it should be attached or couriered to the manufacturer.
Colour specifications
Colour should not be described only as “navy”, “off-white”, or “olive”. These words can mean different shades to different people.
Use clear references such as:
Pantone shade code
Lab dip approval reference
Fabric swatch
Previous approved sample
Colour name plus physical standard
For bulk orders, colour matching is especially important because variations can appear between dye lots.
Stitching and construction details
Stitching affects appearance, strength, and production time. The tech pack should explain how the garment is assembled.
Include details such as:
Seam type
Stitch type
Stitch per inch, if required
Thread colour
Seam allowance
Neck rib attachment
Hem finishing
Topstitching
Bartacks at stress points
Reinforcement details
For example, a polo shirt may need a two-button placket, collar shape, sleeve rib, side slits, inner neck tape, and bottom hem specification. Each of these should be shown or described.
Trims, accessories, and labels
Trims are small, but they can delay production if not finalised.
Add specifications for:
Buttons
Zippers
Drawcords
Eyelets
Elastic
Patches
Hangtags
Size labels
Wash care labels
Brand labels
Barcode or MRP stickers, if needed for retail
For labels, include size, material, colour, placement, folding method, and stitch instruction.
Printing and embroidery requirements
Print and embroidery details should be precise. A print file alone is not enough.
Include:
Artwork file format
Print size in cm
Placement from neck, hem, side seam, or centre line
Print technique, such as screen print, DTF, DTG, puff print, rubber print, or discharge print
Print colours
Embroidery thread colours
Embroidery size and position
Special effects, such as 3D embroidery or appliqué
Wash durability expectations, if tested
A simple example: “Left chest embroidery, 8 cm width, placed 9 cm below highest shoulder point and centred 7 cm from wearer’s left side seam.”
That instruction is far clearer than “small logo on chest”.
Size charts and measurement specifications
A size chart is one of the most important parts of a tech pack. It tells the manufacturer how the garment should fit across sizes.
The size chart should include a base size and graded measurements for other sizes. It should also mention tolerance, which is the acceptable variation during production.
Measurement point | XS | S | M | L | XL | Tolerance |
Chest width | 48 cm | 50 cm | 52 cm | 54 cm | 56 cm | ±1 cm |
Body length | 66 cm | 68 cm | 70 cm | 72 cm | 74 cm | ±1 cm |
Shoulder width | 43 cm | 45 cm | 47 cm | 49 cm | 51 cm | ±0.7 cm |
Sleeve length | 20 cm | 21 cm | 22 cm | 23 cm | 24 cm | ±0.5 cm |
Neck width | 17 cm | 17.5 cm | 18 cm | 18.5 cm | 19 cm | ±0.5 cm |
This is only an example. Actual measurements should match the garment type, target fit, and intended customer.
How to make measurement specs useful
A good measurement section should include:
Point of measurement diagrams
Clear measuring method
Units in cm for Indian and international production use
Base size identification
Grading rules between sizes
Tolerance for each measurement
For example, “chest width” should explain whether the garment is measured flat from underarm to underarm or around the full body circumference. If this is not clear, the factory and brand may measure the same garment differently.
How manufacturers use tech packs for sampling and bulk production
Manufacturers review tech packs before they begin production. This review helps them check whether the design is clear, practical, and ready for sampling.
Before sampling
During the sampling stage, the manufacturer may use the tech pack to:
Review fabric and trim availability
Estimate fabric consumption
Create or adjust the pattern
Prepare the first sample
Check print or embroidery placement
Compare sample measurements against the size chart
Suggest construction changes if needed
The first sample often leads to comments. The brand may request fit changes, fabric changes, print adjustments, or stitching corrections. These changes should be updated in the tech pack, not only mentioned in messages.
A revised tech pack becomes the new production reference.
Before bulk production
Once the sample is approved, the manufacturer uses the tech pack for bulk production planning.
The document guides:
Fabric sourcing and cutting
Size ratio planning
Stitching line instructions
Printing or embroidery setup
Label and trim placement
Finishing and packing
Quality checking
For bulk production, the approved sample and the updated tech pack should match. If they conflict, confusion can occur on the production floor.
Manufacturers may also prepare internal production sheets based on the tech pack. These help supervisors and operators understand the approved garment details.
Common tech pack mistakes and what new brands should include
New clothing brands often prepare tech packs with good design intent but missing production details. The most common issue is assuming that a manufacturer will interpret the design exactly as imagined.
That rarely works well.
Common mistakes to avoid
Avoid these issues before sharing a tech pack:
Using only moodboard images instead of technical sketches
Missing size chart or incomplete measurements
No GSM or vague fabric description
Colour names without shade references
Print placement described without measurements
Missing label and trim details
No tolerance allowed in measurement specs
Conflicting information between sketch and notes
Not updating the tech pack after sample changes
Sending low-quality artwork files for print or embroidery
Forgetting packing instructions for bulk orders
A simple mistake can create a larger production issue. For example, if a neck label is shown in the sketch but not listed in the trims section, the manufacturer may need clarification before production can move ahead.
What first-time brands should include
A first tech pack does not need to look complicated. It needs to be clear.
At minimum, include:
Garment name and style code
Front and back technical sketches
Fabric type, composition, and GSM
Colour references
Size chart with measurement points
Stitching and construction notes
Print or embroidery artwork and placement
Trim and label details
Packing requirements
Reference images or approved sample notes
Quantity and size ratio, if known
For example, a startup planning a 500-piece oversized T-shirt order should include the fit measurements, GSM, neck rib width, print size, artwork file, label placement, and packing method. This allows the manufacturer to quote and sample more accurately.
How ZOOKS can help
Brands do not always have a perfect tech pack at the start. That is normal, especially for first collections.
ZOOKS can review available design details, identify missing production information, and guide brands on what is needed before sampling or bulk manufacturing. This helps reduce repeated clarifications and gives both sides a cleaner starting point.
For custom and bulk apparel enquiries, share your design details, tech pack, or rough concept with ZOOKS and ask for a production review before starting sampling.
A tech pack does not replace good communication, but it makes that communication much more precise. When the design, measurements, fabric, trims, printing, embroidery, and construction details are documented clearly, manufacturers can produce garments closer to the brand’s requirements from the first sample to bulk delivery.
