Spanish retailer Zara has again been accused of selling "sub-standard" clothes in China after tests were said to have found garments labelled with incorrect fibre content.

The claims, reported by China Daily, come seven months after parent Inditex admitted that labelling on some Zara men's trousers tested by the Beijing Consumer Association (BCA) did not disclose the acrylic and viscose content.

"Zara's Quality Control Department is working to correct this and to avoid it for the future," Inditex said at the time.

But now it seems similar tests by the Shanghai Municipal Bureau of Quality and Technical Supervision found the fibre content on a batch of Zara cardigans did not match the label. Other brands including Nautica, CK Jeans and TeenieWeenie were also said to have failed the tests.