LHF Straight Mitred Corner Back Cushion Cover

Boxed & Piped Cushion with Foam & Dacron
Boxed & Piped Cushion with Foam & Dacron

How to Order LHF Straight Mitred Corner Back Cushion Cover (Made Easy)

Pick Your Units – Choose whether you’re measuring in millimetres (mm), centimetres (cm), or inches (“) and enter your sizes
Need a New Inner? – Choose if you want us to supply a cushion interior or just the cover.
Add Extras (Optional) – Add Stockinette or Dacron wrap to make the cushion plumper and easier to fit.
Design Your Cover – Pick your cover style and answer a few quick questions.
Add Any Notes – Let us know anything extra (e.g. zip position, which side is the front).
Add to Cart – Once you’re happy, click Add to Cart.

Now Choose Your Fabric

Once your cover design is in the cart, you’re ready to choose your fabric.

 

 

Measurements

Measurements

Reference Image

choose your cushion filling

COVER ONLY (NO FOAM)

Use this option to create a cover to the sizes entered above

BUDGET LIGHTWEIGHT FOAM V28

This lightweight foam is a great choice for headboards, crafts, costumes, and a variety of general-purpose projects. It’s easy to work with and perfect for decorative or low impact uses. Just a heads-up: we don’t recommend this grade for seating or any application where it’ll need to support weight regularly.

Grade
V28
Density
28 kg / m3
Properties
Flame Retardant
Not Suitable For Seating

STANDARD FIRM RX33 (BLUE)

Medium density firm foam. Suitable for seating perfect for sofas, dining chairs, boats, caravans, and camper van seating and mattresses. Best choice for cushions 3–4 inches thick. May be too firm for cushions above 5” in thickness  

Grade
RX33
Notional Hardness
200 N
Density
33 kg / m3
Properties
Flame Retardant
Firm, Medium Density Foam

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

PREMIUM HIGH FIRM RX39 (BLUE)

Most popular High density firm foam. Suitable for seating perfect for sofas, dining chairs, boats, caravans, and camper van seating and mattresses. Best choice for cushions 3–4 inches thick. May be too firm for cushions above 5” in thickness

Grade
RX39/200
Density
39 kg / m3
Properties
Flame Retardant
Highly Recommended Firm Seating & Mattress Foam

PREMIUM MEDIUM FIRM RX39 (ORANGE)

RX39/120 Orange Foam CushionsA popular high-density foam with a soft to medium feel. Ideal for achieving a medium comfort level in thicker cushions or a softer feel in thinner ones. Also works well as a top layer over firmer foam to enhance comfort.

Grade
RX39/120
Notional Hardness
120 N
Density
39 kg / m3

PREMIUM MEDIUM FIRM REFLEX 40H (GREY)

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 sofa cushions, armchairs, or even as a mattress.

Grade
REFLEX 40 H
Notional Hardness
150 N
Density
40 kg / m3
Properties
Flame Retardant
Highly Recommended, High Density, Medium Firm, Seating & Mattress Foam

VASCO 50 MEMORY FOAM (WHITE/ YELLOW)

High-quality UK-made, heat-sensitive foam that softens and moulds to your body, offering pressure-relieving comfort. Commonly used in mattresses, toppers, pillows, wheelchair cushions, and medical products.

Grade
VASCO 50
Notional Hardness
65 N
Density
50 kg / m3
Properties
Flame Retardant

RX39 FIRM / MEMORY FOAM 1" (2.5cm) COMBO

This product is made by laminating RX38 firm blue foam with a 1″ layer of memory foam. It is essential that the total thickness (C) is greater than 1″. If you order this product at exactly 1″ thick, it will consist of memory foam only

Grade
RX39 / Memory Combo
Density
40 kg / m3
Properties
Flame Retardant

RX39 FIRM/ MEMORY FOAM (2") COMBO

This product is made by laminating RX38 firm blue foam with a 2″ layer of memory foam. It is essential that the total thickness (C) is greater than 2″. If you order this product at exactly 2″ thick, it will consist of memory foam only

Grade
RX39 / Memory Combo
Density
40 kg / m3
Properties
Flame Retardant

MEDIUM FIRM REFLEX 40 / MEMORY 1" COMBO

IMPORTANT GRADE INFORMATION This product combines Reflex 40 medium foam with a 1″ layer of memory foam. If you order at 1″ thick, you’ll receive memory foam only — without the Reflex 40 support layer. To ensure proper comfort and support, the total thickness must be greater than 1″.

Grade
Reflex 40
Notional Hardness
135 N
Room Temp. Hardness
135 N
Density
40 kg / m3
Properties
Flame Retardant

MEDIUM FIRM REFLEX 40 / 2" MEMORY COMBO

IMPORTANT GRADE INFORMATION This product combines Reflex 40 medium foam with a 2″ layer of memory foam. If you order at 2″ thick, you’ll receive memory foam only — without the Reflex 40 support layer. To ensure proper comfort and support, the total thickness must be greater than 2″.

Grade
Reflex 40 H / v50
Notional Hardness
135 N
Room Temp. Hardness
135 N
Density
36 kg / m3
Properties
Flame Retardant

30PPI RETICULATED FOAM

A durable, open-cell foam that resists water, humidity, and chemicals — ideal for outdoor seating and air/water filtration. Its breathable structure also makes it great for humidifiers, ventilation, and industrial filtration systems.

Properties
Not Fire Retardant (None F/R)
Perfect for Outdoor Seating

SUPERIOR HIGH DENSITY FIRM RG50 (WHITE)

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
Properties
Flame Retardant

SUPERIOR HIGH DENSITY MEDIUM FIRM REFLEX 50 (PINK)

Luxury Relex 50  is a high-density, medium firm foam designed for superior support and durability. Ideal for premium seating and high-quality mattresses, this foam is perfect for deep-fill cushions and applications where long-lasting structure and resilience really matter. It holds its shape beautifully, delivering both comfort and strength over time.

Grade
REFLEX 50
Notional Hardness
135 N
Density
50 kg / m3
Properties
Flame Retardant

FIBRE FOR SEATS CUSHIONS

FIBRE FOR BACKS, BOLSTERS & PILLOWS

Grade
100% Hollow Fiber

FOAM CORE FEATHER (MEDIUM FIRM)

High density, medium firm foam Reflex 40h is a high-quality foam known for lasting comfort and support. Bounces back quickly and keeps its shape for years—perfect for as the core for a feather or fibre seat interior    

Grade
REFLEX 40
Notional Hardness
135 N
Room Temp. Hardness
135 N
Density
40 kg / m3

FOAM CORE FIBRE INTERIOR

This Foam core feather combination is best suited to those wanting a medium form seat  

Grade
REFLEX 40 H
Notional Hardness
135 N
Room Temp. Hardness
135 N
Density
40 kg / m3

EUROPEAN 302 DE-QUILLED FEATHER

European 302 de -quilled for extra comfort

    Before you order fabric Please send your design to the basket then order fabric 

Your Created Product

Measurements

choose your cushion filling

FROM £10.00

Description

 

Custom LHF Straight Mitred Corner Back Cushion Covers – Built for Precision, Styled to Last

When it comes to awkward back cushions — especially left-hand facing (LHF) straight mitred corners — forget trying to make a standard cover fit. These aren’t your average square pads. They’re angled, asymmetric, and hard to shop for. But don’t worry — we’ve got the perfect solution.

Introducing our made-to-measure LHF Straight Mitred Corner Back Cushion Covers — crafted to your exact dimensions, tailored to follow every angle, and built to fit like a glove.

So whether you’re completing a fitted seating area in your home, refreshing the back cushions in your camper, or revamping your boat’s saloon, we’ll deliver the finish that looks — and feels — right.


Designed for Tricky Corners – Not Just for Looks, But for Fit

LHF straight mitred cushions can be a headache. One side runs long, the other turns off at a precise mitred angle. It’s a shape that throws standard covers completely off.

That’s why we work to your exact spec — no guessing, no shortcuts. We cut your cover based on precise measurements, including the angle of the mitred join, the cushion’s back edge, and overall depth.

As a result, your cushion sits flush, looks sharp, and stays put, with no tugging, bulging or makeshift solutions. Compared to generic covers, it’s a world apart.


Pick a Style That Matches Your Setup

Once we’ve locked in the fit, it’s time to get the style right. After all, a perfect-fitting cushion deserves a finish that matches its surroundings.

Choose from four time-tested styles:

  • Wrap Style – clean, minimal, ideal for modern settings

  • Box Style – structured and sharp, great for built-in seating

  • Box with Piping – adds that tailored, traditional edge

  • Box Pleat Style – elegant and classic, adds depth and form

Whichever you choose, your cover is made to order by skilled craftspeople, right here in the UK — cut, stitched, and finished by hand.


Fabrics to Suit Every Space

Once the shape and style are sorted, the fabric ties it all together. Your LHF mitred cushion might live in a high-traffic kitchen nook, a sun-drenched saloon, or a high-humidity camper corner — so picking the right material matters.

  • For boats, caravans, and outdoor setups, go with our UV-stable, water-resistant fabrics — designed to handle damp, direct sun, and daily wear.

  • For indoor comfort, choose from our handpicked range of plush velvets, woven cottons, or hardwearing synthetics.

Want a reversible cover? No problem — you can even choose different fabrics for each side to suit your mood or the season.

Not sure which fabric is best? We’ll send you free samples — so you can see and feel before making a choice.


Need New Foam? We’ll Cut That Too

There’s no point covering foam that’s already past it. That’s why we also offer custom-cut foam inserts — shaped to match your LHF mitred layout perfectly.

You can select from:

  • High-density foam – for firm, supportive seating

  • Reflex foam – for a softer, more relaxed feel

Additionally, we can wrap your foam in Stockinette or Dacron, which not only makes it easier to insert but also gives your cushion a plump, smooth finish.


Smart Extras That Make Everyday Use Easier

We believe the small details make the biggest difference. That’s why every cover comes with optional extras to enhance usability and performance:

  • Choose your zip placement for easy access and maintenance

  • Add a non-slip base — ideal for moving vehicles, boats, or slippery seating

  • Include Velcro tabs, ties, or fasteners for added security where needed

And yes — every cover is fully removable and washable, so cleaning is straightforward.


A Smarter, More Sustainable Choice

Let’s face it: replacing a full cushion just because the cover’s worn is a waste — especially with shaped or fitted seating. Instead, a made-to-measure LHF mitred cushion cover lets you refresh what’s tired without tossing what still works.

It’s cost-effective, environmentally sound, and easier than starting from scratch — especially when finding a replacement is near impossible.


Ordering Is Easy – Here’s How

We’ve made the process as clear as possible. To order your LHF Straight Mitred Corner Back Cushion Cover:

  1. Choose your units — millimetres, centimetres, or inches

  2. Enter your cushion’s lengths, widths, depths, and layout details

  3. Select your style, fabric, and any extras

  4. Add any special instructions — e.g. zip location, front-facing side, reversible fabric

  5. Click “Add to Cart” — and we’ll take care of the rest

Need help along the way? Get in touch — we’ll walk you through it.


Why Foam4U?

At Foam4U, we’ve been making custom cushion covers long enough to know: it’s not about guesswork — it’s about getting it right.

We combine traditional upholstery techniques with modern materials and precision cutting, delivering a product that’s fit-for-purpose and made to last.

So whether you’re updating your kitchen bench, kitting out your camper, or adding polish to your boat’s seating — our LHF Straight Mitred Corner Back Cushion Covers are the finishing touch that ties it all together.

Made to measure.
Made to last.
Made in the UK.

 

 

Our sister website www.thefoamshop.co.uk