A Shanghai entrepreneur with a master's degree in textiles has invented a new type of polymer compound that creates a soft, light, stab-resistant layer of protection in an ordinary jacket.

Bodyguards, bank security teams and doctors fearful of disgruntled patients are among the early customers of Ma Feifei's Shanghai Saint Armor Safety Protection Technology Co Ltd.

Ma, who received his degree from Donghua University in Shanghai, said his invention had received a government patent and passed quality tests conducted by the country's public security authority.