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Cot Mattresses

A good cot mattress gives your baby a firm, flat and well-fitting place to sleep every night. Explore cot mattresses in foam, pocket spring and innerspring designs, in sizes to suit most Australian cots and cot beds.

Related Collection

Why Choose the Right Cot Mattress?

The right cot mattress is firm, flat and fits your cot snugly. Red Nose recommends placing your baby on a firm, flat, fitted mattress, and Raising Children Network advises no more than a 20mm gap between the mattress and the cot sides and ends. Many mattresses in our range state that they are firmness-tested to AS/NZS 8811.1:2013, and you'll find foam, pocket spring and innerspring options. Start with your cot's mattress size, usually printed on a sticker on the base, then compare cores, covers and weight.

Get to Know Your Cot Mattress Options

Cot mattresses differ in their core, cover and the sizes they come in. Here's a quick look at 6 options in our collection, so you can see how their features, sizing and setup differ at a glance.

  • Babyrest DuoCore Bamboo Cot Mattress | Core: dual-sided foam | Thickness: 95mm | Standard: AS/NZS 8811.1:2013 | Key features: firmer Baby Side to 12kg, Toddler Side from 12kg, removable bamboo cover and lightweight
  • Babyrest ComfiCore Cot Mattress | Core: ventilated solid foam | Thickness: 95mm | Standard: AS/NZS 8811.1:2013 | Key features: OEKO-TEX Standard 100 cover, removable and machine washable cover, lightweight
  • Boori Pocket Spring Mattress | Core: pocket springs | Size: fits current Boori cot beds | Standard: AS/NZS 8811.1:2013 | Key features: breathable polyester outer, not suitable for pre-2016 Boori cots
  • Seena Pocket Spring Mattress | Core: individually wrapped pocket springs | Sizes: 1300 x 690, 1310 x 750, 1320 x 700, 1320 x 750 and 1080 x 530mm | Standard: AS/NZS 8811.1:2013 | Key features: rolled mattress-in-a-box
  • Kangaroo Deluxe Mattress | Core: tempered bonnell innerspring with Dunlop foam | Sizes: 12 sizes listed | Standard: AS/NZS 8811.1:2013 | Key features: double-sided, unbleached cotton quilt, Australian made components
  • Leander Classic Cot Mattress | Core: cold foam with vertical air channels | Size: shaped for the Leander Classic Cot | Standard: See listing | Key features: under-12kg and 12kg+ sides, divisible cover washable at 60°C

Use-Cases and Compatibility

Here's how to match a mattress to your cot and routine.

- For standard Australian cots

Many cots take a mattress around 130 x 69cm or 132 x 70cm. The Seena Pocket Spring and Kangaroo Deluxe come in several sizes, so you can choose the one that matches your cot.

- For Boori cot beds

The Boori Pocket Spring Mattress fits current Boori cot beds (not pre-2016 models). The Boori Airflow and Boori Foam Cot Bed mattresses are also made for Boori cot beds; check each listing for fit.

- For oval and European-size cots

Oval cots need a matching oval mattress, such as the Leander Classic Cot Mattress or the Boori Oval Pocket Spring Mattress. European cots often take 140 x 70cm, like the Pixie Cot Mattress.

- For lighter sheet changes

Foam mattresses such as the Babyrest ComfiCore are lighter than innerspring, which makes lifting the mattress for sheet changes easier.

Looking After Your Cot Mattress

A little care keeps your cot mattress clean and supportive. Always check the care instructions for your specific model.

Use a protector - A waterproof mattress protector under the fitted sheet helps keep spills and accidents out of the mattress.

Air it out - Let a new rolled or vacuum-packed mattress expand fully, following the maker's instructions, before use.

Wash the cover - Some mattresses, like the Babyrest DuoCore and ComfiCore, have a removable, washable cover.

Flip or rotate - Dual-sided mattresses have a baby side and a toddler side, so flip yours at the stage the maker recommends.

Check the fit - Re-check that the mattress still sits snugly with no gaps, especially after moving the cot base.

What to Check Before You Buy:

- Your cot's mattress size

Measure the inside of the cot or check the sticker on the base. The mattress should leave no more than a 20mm gap at the sides and ends.

- Firmness

Choose a firm, flat mattress. Many in our range state that they are tested to AS/NZS 8811.1:2013.

- Core type

Foam is light and easy to lift, pocket spring gives individual spring support, and innerspring uses a connected spring unit.

- Thickness

Check that the mattress thickness suits your cot, so the sides stay high enough above the mattress.

Looking for more options? Explore our wider range of cot and mattress packages, bassinet mattresses and mattress protectors.

Frequently Asked Questions

What size cot mattress do I need?

Choose the mattress size printed on your cot, often on a sticker on the base, or measure the inside of the cot. Common sizes include 130 x 69cm, 132 x 70cm and 140 x 70cm, and the mattress should leave no more than a 20mm gap at the sides and ends.

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Should a cot mattress be firm?

Yes, Red Nose recommends a firm, flat, fitted mattress for safe sleep. Many cot mattresses in our range state that they are firmness-tested to AS/NZS 8811.1:2013.

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What's the difference between foam, pocket spring and innerspring cot mattresses?

Foam mattresses are lightweight and often have ventilation channels. Pocket spring mattresses use individually wrapped springs that respond separately, while innerspring mattresses use a connected spring unit with foam and fabric layers.

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What does dual-sided mean on a cot mattress?

A dual-sided mattress has a firmer side for babies and a different side for toddlers. For example, the Babyrest DuoCore has a Baby Side for up to 12kg and a Toddler Side from 12kg.

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Do I need a mattress protector?

A waterproof mattress protector helps keep spills and accidents out of the mattress and is easier to wash than the mattress itself. Choose one made for your mattress size so it fits flat.

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How long does a cot mattress last?

It depends on the mattress and how it's used. Check the warranty and the maker's guidance, and replace a mattress that has sagged, softened or no longer fits the cot snugly.