RHF Diagonal Cut Off Mattress

How to order a RHF Diagonal Cut Off Mattress in 5 simple steps

  1.  Choose cm’s  mm’s or inches.
  2. Enter Your sizes in the boxes provided.
  3.  Choose foam grade from drop down menu.
  4.  Add Cover as required.
  5. Review your order and add to cart.

Please check the lead time for all options chosen.

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Measurements

Measurements

Reference Image

Choose Your Comfort Level

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
  • FIXED PRICE COVERS
    OPTIONS
    MEMORY FOAM PILLOW
    CUSTOM COVERS & UPHOLSTERY
    Contact us for Pricing

Your Created Product

Measurements

Choose Your Comfort Level

FROM £7.00

Description

Custom RHF Diagonal Cut Off Mattress

Made-to-Measure Comfort for Campervans, Caravans, Boats & Motorhomes

Ordering your RHF Diagonal Cut Off Mattress is simple. Just enter your custom measurements, choose your preferred foam or memory foam type, and we’ll precision-cut your mattress to fit perfectly. Designed for spaces where a right-hand diagonal corner is needed, this mattress is ideal for optimising sleep space in compact or angled layouts.

Whether it’s a campervan bed, a motorhome conversion, a boat cabin, or a corner-cut caravan mattress—we’ll make sure it fits and feels just right.


Optional Covers in Three Premium Fabric Options

All our mattresses come with the option to add a removable, zip-off washable cover—a practical way to keep your sleep setup fresh and easy to maintain.

You can choose from three premium fabric options, depending on your needs:

Cooltech™ Quilted Covers

  • Soft, quilted finish for enhanced comfort

  • Breathable design to improve airflow and cooling

  • Great for summer use or warm climates

    Cooltech mattress
    Cooltech covers provide exceptional levels of cooling, Helping to wick away moisture resulting in a more restful nights sleep

TENCEL™ Botanical Fibre Covers

  • Made from sustainably sourced wood pulp

  • Silky-smooth, moisture-wicking, and eco-conscious

  • Trusted by top bedding brands for its breathable comfort

    Mattress with Tencel Cover
    Tencel natural fibre promote a cooling more comfortable nights sleep

Easy Clean Fabric

  • Repels spills, stains, and daily grime

  • Wipes clean in seconds—no fuss, no stress

  • Ideal for pets, kids, and adventurous travel

    Easy Clean Mattress Fabrics
    Breathable Easy Clean for Added Protection

Made for Real Life – Not Just the Showroom

Let’s be honest—real-world travel can be messy. Whether it’s dirty hiking boots, beach sand, or breakfast in bed gone sideways, our Easy Clean fabric takes it in stride. It’s a favourite among vanlifers and boat owners for its low-maintenance performance.


Complete the Setup with a TENCEL™ Adjustable Pillow

Customisable Comfort with Eco-Friendly Design

Pair your RHF mattress with our Shredded Memory Foam Pillow, wrapped in a breathable TENCEL™ cover for cool, sustainable sleep. With a zipped fill system, you can easily adjust the pillow’s loft and firmness to suit your preferred sleep style.

Pillow Highlights:

✔ Cooling and moisture-wicking TENCEL™
✔ Hypoallergenic and eco-conscious
✔ Customisable shredded memory foam fill
✔ Removable, machine-washable cover

One pillow. Endless possibilities.
Tailored support for every sleeper, wherever you lay your head.

Tencel Pillow
Our Cooling Tencel Pillows are fully adjustable and can be adapted your individual comfort requirements

Why Choose Foam 4 U?

We’ve been cutting foam and building comfort for over three generations. Whether you’re fitting out a leisure van, upgrading a marine berth, or tackling a tight corner layout, we bring the craftsmanship and practical knowledge to deliver precision, quality, and comfort—every time.


Need Help with Foam, Fabric or Fit?

If you’re unsure about measurements, foam types, or which fabric is best, we’re here to help. Reach out to our experienced team for honest, expert guidance—no pressure, no jargon, just solutions.

 

Our sister website www.thefoamshop.co.uk