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Med/Firm Childrens Mattresses

A medium-firm mattress is a level of firmness that is slightly firmer than a medium mattress but still has a moderate amount of "give". A medium firm mattress is extremely comfortable. It's perfect if you want a little extra support but still, like your bed to feel cosy and soft.

A children's mattress provides the right balance of comfort and support for growing kids. Designed with breathable materials, hypoallergenic options, and firm yet comfortable surfaces, these mattresses promote healthy spinal alignment and quality sleep. Available in single, double and bunk bed sizes, they fit various bed frames. Many feature water-resistant covers, memory foam, or pocket springs for extra durability.

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  1. Comfort Rating
    Med/Firm
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Size

  1. Small Single

    2'6" x 6'3" | 75cm x 190cm

    1 item

  2. Single

    3' x 6'3" | 90cm x 190cm

    4 items

  3. Small Double

    4' x 6'3" | 120cm x 190cm

    2 items

  4. Double

    4'6" x 6'3" | 135cm x 190cm

    3 items

  5. King Size

    5' x 6'6" | 150cm x 200cm

    3 items

  6. Super King

    6' x 6'6" | 180cm x 200cm

    2 items
Fast Delivery

  1. Fast Delivery

    Next day delivery or later. Choose a delivery date at checkout
Comfort Rating
  1. tension-image

    Soft/Med

    Balances comfort and support, providing a soft feel Ideal for sleepers with a lighter build who may find a medium mattress too firm and want a little extra give.

  2. tension-image

    Medium

    Often considered a universal comfort option, suitable for most people regardless of weight, sleeping position or preference.
  3. tension-image

    Med/Firm

    Provides a slight firmness, perfect if you want the extra support but still like your bed to feel cosy and soft.
  4. tension-image

    Firm

    Offers very little give or sink, providing an exceptionally supportive sleeping surface and ideal for people who like to sleep on top of their mattress
Mattress Core

  1. Pocket Springs

    Pocket springs work independently to each other, providing more support and reducing motion transfer.

  2. Memory Foam

    Memory foam uses your body heat to soften and mould to your shape.

  3. Open Coil Springs

    Open coil spring mattresses are a type of coil spring made from a single wire coiled into a helical shape. Open coil mattresses are known for their affordability and durability,

  4. Miracoil Springs

    Miracoil springs provide targeted support and enhanced comfort for sleepers.

  5. Comfort Layers

    A generous mix of upholstered fillings to create a luxurious comfort layer to the mattress
Features

  1. Hypoallergenic & Dust Mite Resistant

    Resists dust mites, mold, and bacteria, Ideal for people with allergies or asthma

  2. Reduces Partner Disturbance

    Perfect for couples, as movement on one side won’t disturb the other.

  3. Pressure Relieving

    Pressure-relieving mattresses are designed to distribute the body's weight more evenly across the surface of the mattress, reducing pressure on specific points such as the hips, shoulders, and spine.

  4. Ideal for All Sleeping Positions

    Offers balanced support, whether you sleep on your back, side, or stomach.

  5. No Roll-Together

    Each spring moves independently, preventing sagging or dips over time.

  6. Lightweight & Easy to Move

    A lighter mattress, making it easy to move or transport.

  7. Good Airflow & Breathability

    The open coil structure allows air to circulate, helping to prevent overheating.

  8. Extra Support & Spinal Alignment

    The Individual pocket springs move independently, adapting to your body's contours which creates targeted support, reducing pressure points on the back, neck, and joints.
Mattress Depth

  1. 15cm-19cm

    1 item

  2. 20cm-24cm

    1 item

  3. 25cm-29cm

    2 items
Brand

  1. Silentnight

    Silentnight beds and mattresses with up to 50% off RRP

  2. Giltedge Beds

    Giltedge Beds offer a range of beds, mattresses and headboards at unbeatable prices.

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4 Results

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  1. Silentnight Eco Memory Bunk Mattress
    Add to Wish List Add to Compare
    tension

    Med/Firm

    Firmness

    Med/Firm · 4 / 5

    1

    2

    3

    4

    5

    Mattress Type:

    Memory Foam

    Memory Foam

    Miracoil Springs

    Miracoil Springs

    Silentnight Eco Memory Bunk Mattress

    Be the first to review this product
    Mattress Core
    Memory Foam
    Miracoil Springs
    Mattress Depth
    15 cm depth
    £187.27
    £206.00
    Was £206.00
    RRP £239.00
    free-delivery

    Delivery available within 7 - 14 Days

    brand
  2. Giltedge Beds Elerby Mattress
    Add to Wish List Add to Compare
    tension

    Med/Firm

    Firmness

    Med/Firm · 4 / 5

    1

    2

    3

    4

    5

    Mattress Type:

    Open Coil Springs

    Open Coil Springs

    Comfort Layers

    Comfort Layers

    Giltedge Beds Elerby Mattress

    Rating:
    96%
    4.8 · 5  reviews
    Mattress Core
    Open Coil Springs
    Comfort Layers
    Mattress Depth
    25 cm depth
    Sale From
    £208.33
    £250.00
    Was £250.00
    RRP £389.00
    free-delivery

    delivery from Friday 22nd May

    brand
  3. Silentnight Classic Miracoil Memory Mattress
    Add to Wish List Add to Compare
    tension

    Med/Firm

    Firmness

    Med/Firm · 4 / 5

    1

    2

    3

    4

    5

    Mattress Type:

    Memory Foam

    Memory Foam

    Miracoil Springs

    Miracoil Springs

    Silentnight Classic Miracoil Memory Mattress

    Rating:
    98%
    4.9 · 59  reviews
    Mattress Core
    Memory Foam
    Miracoil Springs
    Mattress Depth
    25 cm depth
    Sale From
    £259.09
    £285.00
    Was £285.00
    RRP £469.00
    free-delivery

    delivery from Friday 22nd May

    brand
  4. Giltedge Luxury Pocket 1000 Mattress
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    tension

    Med/Firm

    Firmness

    Med/Firm · 4 / 5

    1

    2

    3

    4

    5

    Mattress Type:

    Pocket Springs

    1000 Pocket Springs

    Giltedge Luxury Pocket 1000 Mattress

    Be the first to review this product
    Mattress Core
    1000 Pocket Springs
    Mattress Depth
    28 cm depth
    Sale From
    £308.33
    £370.00
    Was £370.00
    RRP £423.00
    free-delivery

    Free delivery from Friday 22nd May

    brand

4 Results

  • 1

Childrens Mattresses FAQ's

What size mattress is best for a child?

Choosing the right size mattress for a child depends on their age, height, and sleeping needs. The most common options are toddler, twin (single), and full (double) mattresses.

For toddlers transitioning from a cot, a toddler mattress is an option but would need replacing quite soon as the child outgrows it, many parents prefer to skip the toddler mattress and move straight to a single mattress (90cm (38") x 190cm (75")), which is the most popular choice for growing kids. It provides ample space and fits most bunk beds, mid sleepers, and standard bed frames.

For taller children or those who need more space to move around, a small double (120cm (38") x 190cm (75")) or double (double) mattress (135cm(54)" x 190cm (75")) may be better. A full mattress allows extra room for stretching and can last well into the teenage years.

Ultimately, the best size depends on room space, budget, and long-term comfort. Investing in a high-quality, supportive mattress ensures your child gets a good night’s sleep, essential for healthy growth and development.

How Firm Should a Children's Mattress Be?

The firmness level of a children’s mattress is crucial for their comfort, spinal support, and overall sleep quality. The ideal firmness depends on their age, weight, and sleeping habits.

For toddlers and younger children, a medium-firm to firm mattress is recommended. This provides proper spinal alignment and prevents sinking too deeply, which can be unsafe for younger sleepers. A firmer mattress also supports growing bones and muscles, reducing the risk of discomfort or poor posture.

For older children and teenagers, a medium to medium-firm mattress is often preferred. This allows for a balance between support and comfort, adapting to different sleep positions. Side sleepers may prefer a slightly softer surface, while back and stomach sleepers need more firmness to prevent misalignment.

Memory foam, hybrid, and pocket-sprung mattresses are popular choices, offering both support and pressure relief. Some options also feature zoned support, catering to different areas of the body.

Ultimately, the best mattress firmness for a child depends on their age, weight, and comfort preference. A breathable, supportive, and durable mattress ensures they get the restful sleep needed for healthy growth and development.

Do children's mattresses need to be hypoallergenic?

A hypoallergenic children’s mattress is highly recommended, especially for kids prone to allergies, asthma, or sensitive skin. Hypoallergenic mattresses are designed to resist dust mites, mold, and bacteria, reducing common triggers for allergies and respiratory issues.

Children have developing immune systems and can be more vulnerable to airborne allergens. Standard mattresses can accumulate dust, pet dander, and moisture, which may lead to discomfort, congestion, or skin irritation. Hypoallergenic mattresses use breathable, antimicrobial, and non-toxic materials such as organic cotton, latex, or memory foam with protective covers. Some models also feature waterproof layers to prevent spills and moisture buildup.

Even if a child doesn’t have allergies, a hypoallergenic mattress ensures a cleaner and healthier sleep environment by preventing the growth of bacteria and allergens. Regular cleaning and the use of washable mattress protectors further enhance protection.

Ultimately, choosing a hypoallergenic mattress helps promote better sleep, improved air quality, and long-term comfort for children, making it a smart investment for any parent concerned about their child’s health and well-being.

Are waterproof mattresses good for kids?

Yes, waterproof mattresses are an excellent choice for kids. They offer protection against spills, bedwetting, and accidents, keeping the mattress clean, dry, and hygienic. Young children, especially toddlers and those transitioning from potty training, benefit from a mattress that resists moisture, preventing stains and bacteria buildup.

A waterproof mattress or a waterproof mattress protector helps extend the lifespan of the mattress by preventing liquid absorption, mold, and unpleasant odors. Many waterproof mattresses use breathable, hypoallergenic materials that provide comfort while maintaining airflow and temperature regulation, ensuring a restful sleep.

In addition to hygiene, waterproof mattresses are also easier to clean. A quick wipe with a damp cloth or mild detergent can remove most messes, reducing the need for deep cleaning or replacements.

Overall, waterproof mattresses are a practical and hygienic option for kids, offering durability, cleanliness, and peace of mind for parents.

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