The company who own Simply Be and Jacamo, N Brown, has said it is considering closing its 20 remaining shops and becoming solely an online retailer.
The decision is putting 270 jobs at risk.
N Brown has explained that shopper numbers at the stores had been "very disappointing".
Last year, the stores generated £15m of sales, about 2% of group revenue.
The news is the latest blow to UK High Streets, with a string of retailers having announced store closures this year.
