Underwear Tech Pack Template (Free Download)

Underwear Tech Pack Template: The Six Sections a Factory Can Quote From

A complete underwear tech pack has six sections — programme summary, construction detail, fabric and trims with measured targets, a grading grid with tolerances, labelling and packaging, and dated approval checkpoints — and the fields that decide the price are fabric weight in gsm, stretch and recovery, waistband finished height, seam type and stitches per inch. On a custom OEM programme the pack’s job is to remove one sampling round, not to describe the product.

Where can I download the template?

Download the PDF (unitex-underwear-tech-pack-template.pdf) — free, no registration required.

What is inside the template?

• Programme summary — market, price point, quantity, in-warehouse date, Incoterms
• Construction sheet — rise, waistband type and height, seam type and SPI, gusset, fly, pouch
• Fabric and trims table — composition, weight in gsm, stretch and recovery, colour references
• Size grading grid — waist relaxed and stretched, hip, inseam, front rise, leg opening
• Labelling and packaging — care label wording, fibre declaration, carton assortment, certification evidence
• Approval checkpoints — lab dip, fit sample, pre-production sample, bulk, pre-shipment inspection

What comes back, and when?

A costed quotation and a dated production plan, normally within three working days, with every field you left open listed back to you, a proposed value beside it and the reason for that value.

What has to be filled in for each of the six sections?

The template is only as useful as the fields you actually complete. This is the field list per section, and what breaks downstream when a field is left blank or left to the supplier to guess.

Section	Fields that must be filled in	What breaks without it
Programme summary	Destination market, retail price point, total quantity, size curve, in-warehouse date, Incoterm and named place	The factory quotes against the wrong fabric weight or the wrong packing cost
Construction sheet	Rise, waistband type and finished height, seam type and stitches per inch, gusset construction, fly type, pouch shape, hem treatment	Every one of these changes the labour minutes, so the quote is a guess
Fabric and trims	Composition with percentages, weight in gsm, knit structure, stretch and recovery target, colour reference, elastic spec with width and elongation	Two mills interpret “cotton spandex jersey” as two different fabrics
Size grading grid	Every measurement point with the base size value and the grade increment per size, in centimetres, plus the tolerance band	Pattern making restarts, and the grading is redone at the buyer’s risk
Labelling and packaging	Care label wording and symbols, fibre declaration, country of origin marking, polybag and carton assortment, carton marks	Goods pass inspection and fail at the destination border on marking
Approval checkpoints	Lab dip, fit sample, pre-production sample, bulk first article, pre-shipment inspection, each with a date and an owner	Nobody knows who signs off, so nothing is signed off

Which measurements belong on the size sheet, and how is each taken?

A measurement list is not a size sheet. What makes it one is the method written beside each point, because half of all sampling rounds are caused by two parties measuring the same garment in two defensible ways.

Measurement point	How it is taken	The ambiguity that costs a sampling round
Waist, relaxed	Garment flat, no tension, measured across the top of the waistband, doubled	Measured at the seam instead of the band edge, or measured on a curved band
Waist, stretched	Band extended to its practical maximum and held, then measured and doubled	No stated extension force, so the figure is not repeatable
Front rise	From the top of the waistband to the crotch seam, along the front panel	Measured to the gusset seam rather than the crotch point
Back rise	Same path on the back panel, from band top to crotch seam	Measured as a straight vertical rather than following the curve
Hip	Across the widest point, at a stated distance below the waistband	The distance below the band is not stated, so the point moves between sizes
Leg opening	Inner edge to inner edge of the finished opening, laid flat	Measured on the curve rather than the straight chord
Inseam	Crotch seam to hem, along the inner leg	Measured from the gusset edge on styles that have one
Side seam	Waistband top to hem along the side	Meaningless on seamless circular-knit styles, where there is no side seam to measure
Gusset width	Finished width of the gusset panel, measured across its narrowest point	Measured at the seam allowance rather than the finished edge
Elastic height	Finished height of the waistband, measured after laundering	Measured before wash, when the band has not yet relaxed

State the tolerance for each point rather than one figure for the whole sheet. Commercial conventions in the cluster run to roughly one centimetre on body measures and half a centimetre on elastic edges, with fabric weight held to about five percent — those figures are trade practice, not a published standard, so the sheet should carry whichever band you want enforced.

Which tests should be named in the pack?

Naming the test method in the tech pack does two things at once: it tells the factory what to test, and it tells the laboratory what to report. A pack that says “colour fastness” gets a report nobody can act on.

Property	Method to name	What the result decides
Dimensional change after washing	ISO 6330, with the wash and dry cycle stated	Whether the grading has to be offset, and whether the garment still fits after five washes
Colour fastness to domestic laundering	ISO 105-C06	Whether a dark shade can ship with a pale one in the same pack
Colour fastness to perspiration	ISO 105-E04	The risk that matters most on waistbands and gussets worn against skin
Stretch and recovery	ASTM D2594 for low-power knitted fabrics	Whether the band sags after wear, which is the most common consumer complaint
Mass per unit area	ASTM D3776	The weight in gsm that the price was quoted against
Care labelling	ISO 3758 symbols, with the wording fixed in the pack	Whether the label matches the tested performance
Flammability, US-bound	16 CFR 1610 on the shell fabric, with fibre content and surface stated	Whether the fabric is exempt, and if not whether it passes as Class 1
Inspection	ISO 2859-1, inspection level and AQL stated	Whether “passed inspection” means anything specific

16 CFR 1610 is a fabric test that returns a class, not a licence to sell, and it carries exemptions that decide whether you need to test at all. Hats, gloves, footwear and interlining are outside its scope, and under 1610.1(d)(2) fabrics made entirely of acrylic, modacrylic, nylon, olefin, polyester or wool are exempt at any weight and whether the surface is plain or raised. Cotton, and any blend that is not wholly one of those fibres, has to be tested; a raised surface on cotton does not remove the obligation. Class 1 is the normal outcome for an underwear knit, and a failure changes the fabric, not the style.

Which eight fields cause most second sampling rounds?

Across the programmes we run, a re-sample almost always traces back to one of these eight fields being blank, contradicted elsewhere in the pack, or left to the supplier’s default.

• Fabric weight in gsm, with the tolerance — “medium weight jersey” is not a specification.
• Stretch and recovery target, measured rather than described.
• Waistband finished height and elongation, because wide bands change the rise.
• The base size the grading starts from, and the increment per size.
• Shrinkage allowance, stated as a number after a named wash cycle.
• Seam type and stitches per inch, which set both durability and labour cost.
• Colour reference tied to a physical standard — a lab dip number, not a screen colour.
• Care label wording, which has to be consistent with the tests actually run.

What does the tech pack not replace?

Three things, and buyers who expect the pack to cover them are usually the ones who re-sample.

1. A lab dip. A colour reference starts a conversation; only a dyed sample ends it. Approve the dip before the fit sample is cut, or the fit sample is cut in the wrong colour and the comments get mixed.
2. A fit session on a body or a form. Measurements describe a garment; they do not tell you where it rides. One fit session on the base size catches what a grading grid cannot.
3. A pre-production sample. The pack specifies, the PPS proves. Nothing in the document removes the need to see the first garment made on the production line with the production fabric.

How do you use the template with us?

Fill in the six sections; where a field is genuinely open, write “recommend” next to it and we will propose a value with the reason. Send it with a sketch or a reference garment. If you want the measurement sheet pre-filled with the points that apply to your custom construction — brief, boxer brief, boxer short, high-waist or seamless — ask for that version instead of starting from the blank grid, and read the cost and order-size breakdown alongside it so the quantity you specify matches the price you expect.

A tech pack is also the cheapest test of a supplier’s document discipline: a supplier who returns your sheet with the gaps marked is reading it, and one who returns a quote without comment is quoting from habit. That distinction is the same one behind our five checks before a first order.

References

The standards named in the pack, at the publisher.

• ISO 6330, Domestic washing and drying procedures for textile testing — iso.org
• ISO 3758, Care labelling code using symbols — iso.org
• ISO 2859-1, Sampling procedures for inspection by attributes — iso.org
• 16 CFR 1610, Standard for the flammability of clothing textiles — ecfr.gov
• Regulation (EU) 1007/2011, textile fibre names and labelling — eur-lex.europa.eu

Related reading

Underwear MOQ & cost breakdown · Production timeline & lead times · Quality control process · Writing a tech pack: best practices and common mistakes · Request a quotation

Contact

Xiamen Unitex Trade Co., Ltd. — OEM & ODM underwear sourcing and supply-chain management.
Website: www.unitexunderwear.com · E-mail: [email protected] · Tel: 0086-186 5081 3853

Last updated: 2026-11-13 · Xiamen Unitex Trade Co., Ltd. — OEM & ODM underwear sourcing partner

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.