What goes in a tech pack for backpacks?
The drawing, the materials and hardware, the finished measurements and the construction notes a specialist maker quotes from. Drop one photo of your backpack and get its technical flat, free with no account; the pattern itself is made by the maker, not drafted here.
Drop your backpack photo here
or choose one from your phone or computer
JPEG, PNG or WebP. Any phone photo works.
Your photo is stored for 30 days, then deleted. It is used to make your image, and by the studio if you continue there. If you order a pattern from it, a copy is kept with your order.
On this platform the AI does the design and visualisation work and a human pattern maker cuts the pattern. That split is deliberate. How the pattern is made.
Tech Pack for a backpack
A tech pack for backpacks is the brief a specialist maker quotes from: the drawing, the materials, the measurements and how the piece is put together.
Measure a backpack you like and write its finished dimensions and hardware sizes into the pack; the maker builds the pattern from them.
Most backpacks start from cotton canvas; rigid denim is the less usual line on a bill of materials.
What you get
A technical flat of your backpack, drawn from one photo in black line on white, ready for the materials and measurements of your tech pack.
Step by step
- Photograph the backpack from the front, laid flat, in daylight.
- Get its technical flat from the flat sketch tool.
- Add the materials, trims and hardware, with their sizes.
- Send the pack to a specialist maker for a quote and a sample.
A common mistake
Sending a maker a picture with no measurements: the sample comes back in the size the maker guessed.
Bill of materials lines for backpacks
- Cotton canvas
- 340 to 600 g/m²; machine wash at 30 to 40 °C
- Full-grain bag leather
- 1.2 to 2 mm thick; leather specialist clean only
- Polyester oxford
- 200 to 400 g/m²; machine wash at 30 to 40 °C
- Rigid denim
- 340 to 470 g/m²; machine wash cold, inside out
Typical trade ranges, not one mill's figures: confirm them with your mill.
The backpack, in numbers
A backpack carries weight on both shoulders, so straps, back panel and base are reinforced. It has many parts: panels, pockets, straps and webbing.
- Pattern pieces
- about 15 to 30
- Cloth needed
- about 1.0 to 1.6 m of 150 cm cloth
Typical figures for an adult size M.
Also: how the studio works, prices and questions and answers.
Start free