How to choose the most suitable mattress for a floor bed

Choosing a mattress for a floor bed can feel surprisingly overwhelming. With so many options - thick, thin, foam, springs, firm, soft - parents often wonder what’s actually best for a young child.

After using a floor bed with my daughter since she was 9 months old, I've learned that the ideal mattress isn't about luxury features or being as thick as possible. It's about supporting your child's independence, providing comfortable sleep, and making everyday family life easier.

Here’s what truly matters when choosing a mattress for your child’s floor bed - and why a slim, firm, foam + springs mattress (like the IKEA Vannareid) has been a game-changer for us.

For most Montessori-inspired floor beds, a slim, supportive mattress is often the most practical choice.

Here's what I would look for.

1. A slim mattress supports independence

One of the main reasons parents choose a floor bed is to allow children to move freely and independently.

When my daughter transitioned to her floor bed at 9 months old, she wasn't walking yet. She crawled in and out independently, explored her room, and learned how to navigate her space safely.

A slim mattress - ideally around 10–15 cm thick - makes a big difference.

A very thick mattress creates a higher step down to the floor, which can be challenging for babies and younger toddlers who are still developing balance and coordination.

A lower sleeping surface allows children to:

  • Climb in and out independently
  • Build confidence in their movements
  • Reduce the risk of tumbles
  • Explore their environment safely

After all, one of the greatest benefits of a floor bed is freedom of movement. A slim mattress helps support that goal.

2. Firm and safe - but still comfortable

A common misconception is that softer automatically means more comfortable.

For young children, a mattress that is too soft can make movement more difficult and may not provide the support growing bodies need.

At the same time, an extremely hard mattress isn't ideal either - especially when parents inevitably find themselves reading bedtime stories, comforting a sick child, or spending the occasional night beside them.

The sweet spot is:

Firm, safe, supportive, and comfortable.

In my experience, mattresses that combine pocket springs with a comfort layer of foam often provide the best balance of support, durability, safety, and comfort.

The mattress we've used for over four years is the IKEA Vannareid. It combines springs and foam and has remained supportive despite years of use, including many nights where either my husband or I have slept on it.

No sagging. No sinking. No springs poking through.

Just simple, reliable comfort.

3. Don't assume thicker means better

Many parents naturally associate a thicker mattress with better quality.

But mattress quality comes from its materials and construction - not simply its height.

Some lower-profile mattresses I found in Australia that are better suited to floor beds due to how slim they are include:

All of these mattresses can be a good choice depending on your family's priorities and budget. Some focus on affordability, others on natural materials, while some combine springs and foam for added comfort and support. No mattress will tick every box, so it's about deciding what matters most to you.

However, when choosing a mattress specifically for a floor bed, thickness deserves careful consideration.

A thicker mattress:

  • Sits higher off the ground
  • Can be harder for younger children to access independently
  • Is heavier to move and rotate
  • Makes changing sheets more difficult
  • Reduces the effective height of any bed rails

A slim mattress often provides all the comfort a child needs while preserving the key benefits of a floor-bed setup. Look at my photo below how much safety space there is above the mattress. This makes a huge difference and brings peace of mind.

4. Rail height matters more than you think

This is something many parents don't consider.

If your floor bed includes safety rails, the thickness of your mattress directly affects how much protection those rails provide.

The thicker the mattress, the less rail remains above it.

For example:

A 25 cm mattress inside a floor bed will sit much higher than a 12 cm mattress, reducing the amount of visible rail around the child.

While every bed design is different, a slimmer mattress generally allows more of the rail to remain exposed, helping maintain the intended level of protection.

5. Breathable and washable is worth 

Children spill things. Children get sick. Children have toilet-training accidents. It's simply part of life.

That's why one of the most underrated mattress features is a removable, washable cover.

The Vannareid comes with a cotton cover that zips off completely, making it easy to wash when inevitable accidents happen.

A breathable cover also helps with temperature regulation, keeping children comfortable throughout the year.

As parents, we spend enough time cleaning already. Anything that makes life easier is worth considering.

6. Practical details make everyday life easier - handles

The best mattress isn't always the one with the longest list of marketing features.

Sometimes it's the small practical details that matter most.

One feature I unexpectedly love on the Vannareid is the built-in handles.

They make it much easier to:

  • Lift the mattress
  • Rotate it
  • Change sheets
  • Move it around the room

These may seem like small things, but when you're changing sheets after a midnight accident, they make a real difference.

7. Think about your priorities first

When parents ask me which mattress I recommend, I usually suggest thinking about priorities before brands.

Ask yourself:

  • How important is independence?
  • Do I want the mattress to be as low as possible?
  • Is natural material content a priority?
  • What's my budget?
  • How long do I expect the mattress to last?
  • Will I regularly lie down beside my child?

Most mattresses fall into three categories:

Foam/High density foam

Generally the lightest and most affordable option. Quality varies significantly between brands. Foam mattresses are generally made from polyurethane and, depending on their construction, may retain heat and feel softer than some parents prefer for a child. Too many disadvantages for me and just one benefit - the price.

Memory foam

Memory foam mattresses are designed to contour to the body and relieve pressure points, which many adults find comfortable. However, it feels like you are sinking which is not ideal for a small child. Also, some memory foam mattresses can feel too soft, making movement and repositioning more difficult, and they may also retain more heat than spring-based alternatives.

Springs + Foam Hybrids

Usually offer an excellent balance of comfort, safety, support, breathability, and durability. Also, there are some very affordable options on the market. This is my top choice. The compromise is you still have a thin layer of non-organic material - the polyurethane. 

Natural Latex

Often the most natural option available, but typically also the most expensive.

There isn't a single perfect mattress. There is only the mattress that best matches your family's priorities.

Reliability and Value for Money

At around $169 delivered when we purchased ours, the IKEA Vannareid has been one of the best value-for-money purchases we've made as parents.

More than four years later, it still feels supportive, comfortable, and in excellent condition.

For a child's floor bed, practicality often matters more than luxury features.

And sometimes the simplest option ends up being the best one.

Final Thoughts

A good floor-bed mattress should support independence, comfort, safety, and everyday practicality.

In my experience, a slim, supportive mattress with a washable cover and durable construction ticks all the important boxes.

While there are many excellent options available, I would encourage parents not to focus on finding the thickest or most expensive mattress.

Instead, focus on what a floor bed is designed to achieve:

Helping your child move freely, confidently, and independently while creating a comfortable space for connection, cuddles, bedtime stories, and sleep.

Sometimes the simplest solution really is the best one.

Back to blog

Leave a comment