The Office of Fair Trading is urging people to check the labels when it comes to bedding.
Its warning comes after a 62-year-old from the UK was convicted at Douglas Courthouse of selling unsafe memory foam mattresses without a licence.
Neil Young of Lancashire was given a jail term of six weeks, suspended for two years, after admitting two offences.
John Peet, chief inspector at the OFT, says the prosecution came after painstaking detective work:
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