Should I use a cot wedge or positioner?
Short answer: No. The Lullaby Trust advises against products that keep your baby in one position, such as wedges or straps.
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
- Keep the cot clear: no pillows, duvets, cot bumpers, loose blankets, soft toys, pods, nests, wedges or anything to keep your baby in place.
- Keep the sleep surface flat. Do not incline, tilt or prop the mattress, cot or baby: it does not help reflux. Speak to your doctor about reflux.
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 Eco Fibre Deluxe Cot Mattress (60 x 120 cm)
- Tutti Bambini Pocket Sprung Cot Mattress (60 x 120 cm)
- Tutti Bambini Eco Fibre Cot Mattress (60 x 120 cm)
- Obaby Fibre Mattress - 120 x 60cm
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
What travel cot mattresses does Baby Kingdom sell?Can I buy a second-hand cot mattress?Can a 2 month old sleep on a raised or tilted mattress for reflux?When should I buy a cot mattress?Is a cot mattress right for you? Quick quizGuide to cot mattresses: what to look forAll cot and baby mattresses advice →
Sources
- NHS: Sudden infant death syndrome (SIDS) (accessed 2026-10-21)
- The Lullaby Trust: Sleeping position (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.