Fabric Selection in AI Fashion Design: How to Specify Materials
How to specify fabrics effectively in AI fashion design prompts and tech packs — composition, weight, hand feel, and performance characteristics.
Why fabric specification matters for AI output
Fabric is the most important design choice after silhouette. It determines how a garment drapes, fits, feels, and performs. AI design tools that understand fabric properties produce more accurate garment renders and more appropriate tech pack specifications.
Vague fabric descriptions ('cotton') produce generic output. Specific descriptions ('280 gsm brushed cotton fleece, heavy hand, matte finish') produce garments and tech packs that match a specific production intent.
Key fabric attributes to specify
Include these attributes when describing fabrics to AI tools:
- Fiber content: cotton, polyester, nylon, wool, silk, modal, lyocell, blends
- Weight: gsm (grams per square meter) — lightweight (100-180), medium (180-260), heavy (260-400+)
- Construction: woven (plain, twill, satin) or knit (jersey, rib, interlock, fleece)
- Finish: brushed, mercerized, garment-dyed, enzyme-washed, peached, matte, sheen
- Stretch: rigid, mechanical stretch (1-3%), comfort stretch (5-15%), performance stretch (15-30%+)
- Hand feel: crisp, soft, fluid, structured, papery, smooth, textured
Common fabric specifications by garment type
Different garment categories use characteristic fabric types.
Common fabric specs by garment category
| Garment | Typical Fabric | Weight Range | Key Properties |
|---|---|---|---|
| T-shirt | Cotton jersey, cotton/poly jersey | 140-220 gsm | Soft hand, good drape, breathable |
| Hoodie | Cotton fleece, French terry | 250-400 gsm | Warm, brushed interior, stable |
| Jeans | Cotton denim, stretch denim | 8-14 oz/sq yd | Durable, rigid or stretch, indigo-dyed |
| Dress shirt | Cotton poplin, Oxford cloth | 100-140 gsm | Crisp, smooth, breathable |
| Activewear | Polyester/spandex, nylon/spandex | 160-240 gsm | 4-way stretch, moisture wicking |
| Outerwear | Nylon, polyester, GORE-TEX | 70-200 gsm (shell) | Waterproof, windproof, breathable |
How AI uses fabric data in tech packs
When you specify fabric properties, AI tech pack generators use that data across multiple sections. Fabric weight affects seam allowance specifications. Stretch percentage affects measurement tolerances. Fabric composition affects care label instructions. Fabric weight affects costing estimates.
The more specific your fabric description, the more accurate every downstream specification becomes. 'Cotton hoodie' generates acceptable specs. '300 gsm brushed cotton fleece hoodie' generates precise specs.
Matching fabric to design intent
Fabric selection must match your design intent — an oversized silhouette needs fabric with enough body to hold the shape, while a draped dress needs fluid fabric that falls naturally. AI tools help by suggesting appropriate fabric properties for your described garment.
If you are unsure about fabric specifications, describe the desired garment behavior: 'heavy fabric that holds shape' or 'lightweight fabric that drapes softly'. AI tools translate behavioral descriptions into technical fabric specifications.