Nursery mattresses: firmness, fit and safety for infant sleep

A well-chosen mattress supports safe infant sleep and healthy development. Prioritise firmness, correct size and breathable materials to reduce the risk of suffocation and ensure a comfortable, hygienic sleeping surface.

What to prioritise when buying

Infant mattresses should be firm and flat with no loose bedding. Confirm precise crib or bassinet dimensions so the mattress fits snugly without gaps. Breathable covers and moisture-wicking cores help regulate temperature and reduce humidity. Waterproof protectors are useful for hygiene, but always ensure they do not compromise airflow. Look for certifications and materials that indicate low allergen content and flame resistance according to regional standards.

Types and care guidance

• Foam mattresses: lightweight and supportive—choose high-density foam for long-term durability.
• Coil or innerspring: firmer feel and better airflow for larger cot sizes.
• Breathable designs: cores with channels that improve ventilation.
• Removable covers: machine-washable covers simplify cleaning routines.
• Shop smart: clearance or sale mattresses can be economical—verify hygiene standards and return policies.

Replace a mattress that shows wear, sagging or stains. Keep spare fitted sheets and a protector to maintain cleanliness. When in doubt, consult safety guidelines to ensure the mattress you choose supports safe sleep for infants.