Nap is a raised, fuzzy surface on fabric created by brushing or other finishing processes - distinct from woven pile.
Nap vs Pile
| Nap | Pile |
|---|---|
| Created by finishing | Created by weaving |
| Brushed fibres | Woven loops |
| On flat fabric | Integral to structure |
| Can be brushed away | Permanent |
Creating Nap
Napping (or raising) process:
- Flat fabric is passed through rotating brushes
- Brushes pull fibres to surface
- Creates soft, fuzzy texture
Direction
Napped fabrics have direction - fibres lie one way. Running hand with/against nap feels different.
In Towels
True nap is uncommon in towels (pile is more common), but may appear in:
- Flannel face cloths
- Certain finishes
- Some flat-weave towels