Four companies have misled consumers into thinking clothing and textiles were made from bamboo fibre - when they were really made of rayon, according to the Federal Trade Commission (FTC).

The FTC has laid charges of deceptively labelling and advertising the products, as well as making false "green" claims about their manufacture, antimicrobial qualities and ability to biodegrade.

The four companies involved are: Sami Designs, trading as Jonäno; CSE, trading as Mad Mod; Pure Bamboo; and The M Group, trading as Bamboosa.

All except The M Group have settled the claims, said the FTC, agreeing to stop making the claims and to abide by the Textile Fiber Products Identification Act.

Action against The M Group is ongoing.

"With the tremendous expansion of green claims in today's marketplace, it is particularly important for the FTC to address deceptive environmental claims, so that consumers can trust that the products they buy have the environmentally friendly attributes they want," said David Vladeck, director of the FTC's Bureau of Consumer Protection.

The products had been marketed under names such as ecoKashmere, Pure Bamboo, Bamboo Comfort and BambooBaby.