Owlet Dream Sock

For anxious new parents, the Owlet Dream Sock offers a particular kind of comfort: a soft fabric sock sensor that tracks pulse rate and oxygen levels while baby sleeps, streaming live readings to an app and sounding alerts through a base station if figures move outside preset zones. It genuinely reassures parents who would otherwise lie awake checking the cot. Two honest caveats keep it lower in our ranking. It is expensive, and it is a sleep-tracking aid rather than a life-saving monitor — it cannot prevent SIDS and should support, never replace, safe-sleep basics like placing baby on their back in a clear cot. It's worth a tactful word with the parents first, as some find the constant data reassuring and others find it stressful.