What is Colourfastness and shrinkage?
Pre-shrunk, bio-washed, reactive-dyed, sanforised.
Short answer
Dark cheap cotton without 'pre-shrunk' or 'bio-washed' on the label will change size and colour.
Colourfastness and shrinkage when buying a everyday clothing
Pre-shrunk, bio-washed, reactive-dyed, sanforised.
Why it matters: Untreated cotton can shrink 5–7% in the first wash and bleed onto other clothes.
Look for: Dark cheap cotton without 'pre-shrunk' or 'bio-washed' on the label will change size and colour.
Full Everyday Clothing buying guide