Design Your Own Mattress

How to Design Your Own Mattress in 5 simple steps

  1. Choose cm’s  mm’s or inches.
  2. Enter Your sizes in the boxes
  3. Choose a foam grade.
  4. Add a Cooltech or Tencel cover
  5. Review your order and add to cart.

 

 

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Build your own mattress
Mattress with Tencel Cover
Cooltech mattress

Measurements

Measurements

Reference Image

Foam Grade

BUDGET MATTRESS FOAM (V28)

This lightweight foam is best suited for occasional-use only,  We wouldn’t recommend it for everyday use or situations where long-term support is essential. Keep in mind—thicker, higher-volume mattresses naturally offer more support than thinner ones, regardless of the foam grade.

Properties
Comfort Level : Not Specified ,
Density: MEDIUM/LOW
Recommendations: Occasional use only !

STANDARD FIRM MATTRESS FOAM RX33/190

This medium-density, firm mattress foam  Ideal for mattresses around 3–4 inches thick, offering reliable support and durability. Just a heads-up—it may feel a bit too firm for those who prefer a softer sleeping surface. Keep in mind—thicker, higher-volume mattresses naturally offer more support than thinner ones, regardless of the foam grade.

Grade
RX33/190
Notional Hardness
190 N
Density
33 kg / m3
Properties
Comfort Level : FIRM
Density: MEDIUM

STANDARD MEDIUM FIRM MATTRESS FOAM RX36/125

Medium-density foam ideal for mattresses 4″ and above. It provides balanced support and comfort, making it a great choice for those seeking a medium-firm sleeping surface. Keep in mind—thicker mattresses offer more support than thinner ones, regardless of foam grade.

Grade
RX36/125
Notional Hardness
125 N
Room Temp. Hardness
125 N
Density
36 kg / m3
Properties
Comfort level: MEDIUM FIRM for mattresses above 4" (`10cm ) in thickness
Density: MEDIUM

ORTHOPAEDIC HIGH DENSITY MATTRESS FOAM RX39/200

Most popular High density firm foam mattresses. Best choice for cushions 3–4 inches thick. May be too firm for cushions above 5” in thickness.  Keep in mind—thicker mattresses offer more support than thinner ones, regardless of foam grade.

Grade
RX39/200
Notional Hardness
200 N
Density
39 kg / m3
Properties
Comfort level ; FIRM
Density; HIGH

COMFORT MEDIUM FIRM HIGH DENSITY MATTRESS FOAM RX41/150

High density, medium firm foam Reflex 40h is a high-quality foam known for lasting comfort and support. It bounces back quickly and keeps its shape for years—perfect for mattress. Keep in mind—thicker mattresses offer more support than thinner ones, regardless of foam grade.

Grade
RX41/150
Notional Hardness
150 N
Density
40 kg / m3
Properties
Comfort level : MEDIUM FIRM for mattress over 4"(10cm ) in thickness
Density: HIGH

STANDARD MEMORY FOAM MATTRESS TOPPER VASCO 50

Incorporating Vasco memory foam into your bedding solutions offers enhanced comfort and support, catering to various applications from home to travel.

Properties
Comfort Level: SOFT
Density : HIGH

COOLING REVO MEMORY FOAM MATTRESS TOPPER

This advanced memory foam is designed to provide exceptional comfort and support while keeping you cool throughout the night. Infused with cooling gel technology, it helps regulate temperature, preventing heat buildup and ensuring a restful sleep. Ideal for those who prefer a plush, breathable sleeping surface with enhanced pressure relief.

Properties
Comfort Level : SOFT
Density : HIGH

ORTHO MEMORY FOAM MATTRESS COMBO RX39/200 BASE WITH 1" (2.5CM) MEMORY

Firm V38 base foam bonded to 1″ of Vasco 50 memory foam softens the feel, of the mattress, making what would typically be a firm mattress more comfortable.  Keep in mind—thicker, higher-volume mattresses naturally offer more support than thinner ones, regardless of the foam grade.

Properties
Comfort level : FIRM
Density; HIGH
Minimum Mattress Thickness : Must be over 2" (5cm ) or only memory foam element will be supplied

ORTHO PLUS MEMORY FOAM MATTRESS COMBO RX39/200 BLUE BASE TOPPED WITH 2" (5CM) MEMORY

Firm V38 base foam bonded to 2″ of Vasco 50 memory foam softens the feel, of the mattress, making what would typically be a firm mattress more comfortable.  Keep in mind—thicker, higher-volume mattresses naturally offer more support than thinner ones, regardless of the foam grade.

Properties
Comfort Level; FIRM/MEDIUM
Density; HIGH
Minimum Mattress Thickness : Must be over 2" (5cm ) or only memory foam element will be supplied

COMFORT MEMORY FOAM MATTRESS COMBO RX41/150 BASE TOPPED WITH 1" (2.5CM ) MEMORY

Comfort memory foam mattress combo featuring a supportive Reflex 40 grey base topped with 1″ (2.5cm) of plush memory foam for added pressure relief and comfort.

Grade
RELEX 40 /150
Notional Hardness
150 N
Density
40 kg / m3
Properties
Comfort Level : MEADIUM FIRM
Density: HIGH
Minimum Mattress Thickness : Must be over 1" (2.5cm ) or only memory foam element will be supplied

COMFORT PLUS MEMORY FOAM MATTRESS COMBO RX41/150 BASE TOPPED WITH 2" (5CM ) MEMORY

Comfort Plus Mattress Combo features a supportive Reflex 40 grey foam base topped with 2″ (5cm) of pressure-relieving memory foam.Offers the perfect balance of firm support and plush comfort for a restful night’s sleep.  Ideal for everyday use, guest beds, or custom spaces like campervans and caravans.

Grade
REFLEX 40/150
Notional Hardness
150 N
Density
40 kg / m3
Properties
Comfort Level: MEDIUM FIRM
Density: HIGH
Minimum Mattress Thickness : Must be over 2" (5cm ) or only memory foam element will be supplied

ULTRA FIRM MATTRESS FOAM RG50/230

High density firm foam RG50 is a high-density, firm foam ideal for heavy-duty support. It’s commonly used in seat cushions, gym mats, and other applications where durability and strong support are key. This is the perfect foam for thin Pop-top or Roof-Tent mattresses.

Grade
RG50/230
Notional Hardness
230 N
Density
50 kg / m3
  • MATTRESS COVER OPTIONS

Your Created Product

Measurements

Foam Grade

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Description

Design Your Own Mattress

 Tired of trying to make a standard mattress fit your space? We cut mattresses to the exact size you need — no compromise on fit, no sacrifice on sleep. Design Your Own Mattress

Ideal for homes, campervans, caravans, boats, or anywhere a normal mattress just won’t do. You bring the measurements. We bring the comfort.

Why Foam is Better Than Springs

Sprung mattresses have had their day. Foam is cleaner, safer, and more supportive.

  • Hypoallergenic & Hygienic
    Foam doesn’t trap dust mites or bed bugs the way sprung mattresses can. That means fewer allergens, fewer sniffles, and a cleaner sleep.

  • No Bounce, No Creak
    Foam gives proper body support without the wobble, so you won’t wake up every time your partner rolls over.

  • Better for Your Back
    Foam supports the whole body evenly, helping with pressure relief and joint support — especially in awkward sleeping positions like van beds and v-berths.

  • Longer Lasting
    No coils to break. No sagging in the middle. Just dependable comfort for years.

How It Works

  1. Measure Your Space
    Just grab your tape measure and enter your mattress dimensions in mm, cm or inches.

  2. Pick Your Foam
    We stock high-quality grades to suit all sorts of sleepers:

    • Firm Reflex Foam – solid support

    • RX Premium Grades – comfort with durability

    • Memory Foam Layers – added pressure relief

    • Combination Foam – balanced feel for all-round use

  3. Add a Cover (Optional)
    Make your mattress more comfortable and practical:

    • TENCEL™ Cooling Cover – breathable, smooth, and naturally cool

    • CoolTech Quilted Cover – soft with airflow

    • Delivered to Your Door
      Cut, wrapped and shipped from our UK workshop. Easy.

Who’s it For?

  • Campervans, Motorhomes, and Conversions

  • Boats and Narrowboats

  • Caravans and Holiday Lodges

  • Daybeds, Guest Rooms and Bunk Beds

  • Horseboxes and Garden Rooms

  • Anywhere standard mattresses just don’t work

Why Foam4U?

  • Made to Measure – any size, any spec

  • Quality British Foam – not the cheap stuff

  • Made in the UK – and it shows

  • Eco-Minded – we recycle offcuts where possible

  • Help on Hand – real people, real answers

Start Your Order

Enter your sizes, choose your foam, and get the mattress you actually want.

👉 Design Your Mattress Now

Not sure what’s best? Call us — we’ll talk you through it.

 

Need Help or have questions   Contact Us 

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