Baby wearing sleep bag lying on back in the cot
Is it Safe to Use a Second Hand Mattress?

Red Nose recommends babies sleep on the back and on a firm, clean, well-fitting mattress that is in good condition and placed flat (not tilted or elevated).

Over the years there has been attention in relation to a theory that there may be a link between SIDS and a certain bacteria found in second-hand mattresses.

However, the bacteria in question are normally found on the skin and in the nose and throats of healthy adults and infants. There is no evidence to show that there is an increased risk of SIDS for babies who sleep on a second hand mattress providing that baby:

  • Is not exposed to tobacco toxins before birth or after
  • Sleeps on the back
  • Sleeps on a flat, firm, clean, well-fitting mattress that is in good condition
  • Sleeps with no bedding covering the face or head

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Last updated on September 10, 2025
Published on April 17, 2025

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