RHF Twin Diagonal Cutaway Mattress

How to order a RHF Twin Diagonal Cutaway 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 Covers & Sheets 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 60KG MEMORY FOAM

Grade REVO Notional Hardness 60 N Medium firm (Atr) Density 60 kg / m3  Properties Flame Retardant  

Grade
REVO60
Notional Hardness
60 N
Room Temp. Hardness
60 N
Density
60 kg / m3

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 Twin Diagonal Cutaway Mattress

Split Comfort with a Precise Right-Hand Cut

Designed for twin or split mattress setups that require a right-hand diagonal cut, the RHF Twin Diagonal Cutaway Mattress is all about getting the perfect fit in compact or complex spaces. Ideal for motorhomes, campervans, boats, and caravans with dual beds or modular sleeping layouts, this mattress is built to your exact dimensions—ensuring full support and zero wasted space.

Enter your custom sizes, choose your foam or memory foam, and we’ll take care of the rest.


Optional Covers in Three Premium Fabric Options

Keep your twin setup fresh and functional with one of our optional removable, zip-off washable covers. Choose from three top-quality fabric types to suit your comfort and lifestyle:

Cooltech™ Quilted Covers

  • Breathable and soft quilted texture

  • Helps regulate body temperature

  • Great for warm climates or summer use

    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 sustainable wood pulp

  • Silky-smooth, breathable, and moisture-wicking

  • Eco-conscious and hypoallergenic

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

Easy Clean Fabric

  • Designed to handle spills, stains, and daily mess

  • Wipes clean in seconds

  • Perfect for families, pets, or full-time van-life

    Easy Clean Mattress Fabrics
    Breathable Easy Clean for Added Protection

Built for Life on the Move

You don’t stop travelling just because things get a bit messy. That’s why our Easy Clean fabric is a favourite for adventurous setups. From damp towels to dog hair, it holds up and wipes down with minimal fuss.


Top It Off with a TENCEL™ Adjustable Pillow

Sleep Support That Adapts to You

Our Shredded Memory Foam Pillow with a breathable TENCEL™ cover is the perfect travel companion. With a zipped fill system, you can adjust the height and firmness to suit your sleeping style—whether you’re a side sleeper, back sleeper, or something in between.

Features Include:

✔ Breathable and cooling TENCEL™ fabric
✔ Fully adjustable shredded memory foam interior
✔ Hypoallergenic and planet-friendly
✔ Machine-washable cover for easy care

One pillow. Your sleep, your way.

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 custom sleep solutions for over three generations. From twin setups and diagonal cutaways to full van bed systems, we’ve seen it all—and we know how to get it right. Precision-cut, hand-checked, and built to last.


Not Sure Where to Start? Let’s Talk.

Need help measuring your twin layout? Wondering which foam grade is best? We’re here to help—real advice from real people who know foam inside and out.

 

 

 

Our sister website www.thefoamshop.co.uk