Casualwear manufacturer and retailer American Apparel Inc says it is building momentum in its core businesses after same-store sales rose 10% in November.

The brand recorded a 7% rise in retail store comparable sales and a 32% increase in online sales. Wholesale net sales were flat through November, with overall net sales up 7% over the quarter-to-date.

In October, comparable store sales increased 4%, with a 3% increase in retail store sales and a 6% increase in online sales.

"Our retail channels, both in store and online, are seeing sales growth indicating a revitalised connection to our customer," said chairman and CEO Dov Charney.

"We are excited about this trend, we feel it is long-lasting, and it is one we can meaningfully build upon. Other positive signs include improved efficiency at our manufacturing facilities, stabilisation of world cotton prices and improved profitability at our average retail store."