Is there a mattress or device that prevents SIDS?

Here is the detail behind that answer, taken from current UK guidance from the NHS and the Lullaby Trust.

Things to check

• Measure the inside of the cot. The mattress should fit with no gaps.
• Choose firm, flat and waterproof. Your baby's head should sink no more than a few millimetres.
• Check for a fire-resistant label and the relevant British Standard.

What the guidance says

• No safety standard covers SIDS, so a product that meets a British Standard is not automatically safer for sleep.
• Always place your baby on their back to sleep, in the feet-to-foot position (feet at the bottom of the cot, Moses basket or pram).
• Keep the cot clear: no pillows, duvets, cot bumpers, loose blankets, soft toys, pods, nests, wedges or anything to keep your baby in place.
• Use a firm, flat, waterproof mattress in good condition, with no raised or cushioned edges, that fits the cot or Moses basket with no gaps.

Related questions

What is a cot mattress?

A firm, flat mattress for a standard cot, usually 120 x 60cm.

Shop at Baby Kingdom

Browse cot mattresses 120 x 60

• Tutti Bambini Pocket Sprung Cot Mattress (60 x 120 cm)
• Ickle Bubba Premium Sprung Cot Mattress
• Obaby Moisture Management Mattress -120x60cm
• Obaby Foam Cot Mattress 120 x 60 cm

Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.

More advice

Sources

• The Lullaby Trust: Baby mattresses and bedding (accessed 2026-10-21)
• NHS: Sudden infant death syndrome (SIDS) (accessed 2026-10-21)

General information only, not medical advice. Always follow your product's instructions. If you are worried about your baby, contact your GP, health visitor or 111. In an emergency, call 999.