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.
Once your cover design is in the cart, you’re ready to choose your fabric.
Click the link below to browse our full range:Click Here to See All Fabric Options
Not sure how much fabric you need?Use our Fabric Calculator to work it out easily.
Use this option to create a cover to the sizes entered above
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.
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
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.
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
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.
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.
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.
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
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
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″.
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″.
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.
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.
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.
This Foam core feather combination is best suited to those wanting a medium form seat
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
European 302 de -quilled for extra comfort
We offer a wide range or both Interior Upholstery Fabric & Exterior Water Resistant Fabric suitable for a marine environment. Customer can workout exactly the amount of fabric required per cushion, using the Fabric Calculator. You will only be able to add fabric to your order once you have sent the foam & cover order to the cart.
FROM £10.00
Straight-edged cushions are easy enough — but when your seat has a curved, quarter-circle shape, you’re in a different league. Whether it’s the corner bench in your kitchen, a sweeping seat in your camper, or a curved cushion on a boat’s bow, a standard cover just won’t do the job.
That’s why we make Curved Quadrant Cushion Covers to order — carefully tailored to match the arc of your cushion, not fight against it. No bulges. No bunching. Just a smooth, fitted cover that follows the line of your seating perfectly.
So if you’ve got a rounded edge that’s a pain to cover, we’ve got the answer.
Quadrant cushions have one goal: to wrap neatly into corners without looking awkward. But they’re near impossible to cover properly using anything mass-produced.
That’s why we custom-make each cover, based on your exact measurements — including the radius of the curve, the overall depth, and the straight edge dimensions.
As a result, your new cushion cover will hug the arc tightly, flow neatly into the corner, and sit flat across the top — no twisting, warping, or creasing.
Once you’ve nailed the fit, it’s time to style it up. Depending on where the cushion lives, and how formal or relaxed your setup is, you’ve got four great options:
Box with Piping – gives a tailored, traditional feel
Each one is made to order, stitched by hand here in the UK by people who know their way around a tricky seam.
Now let’s talk about the look and feel. Whether your curved cushion sits by a window, in a camper corner, or out on the water, we’ve got the right fabric for the job:
For outdoor or marine cushions, our UV-resistant, water-repellent fabrics are ideal — tough, reliable, and built to cope with heat and damp
For indoor seating, you’ll find a full spread of comfy, stylish materials — from soft velvets to textured cottons and practical, wipe-clean synthetics
Want a double-sided design? No problem — we can use different fabrics on each side so you can flip it depending on your mood or the season.
Still deciding? We’ll send free fabric samples — so you can touch before you commit.
Even if your cover looks the part, tired foam can let the whole thing down. That’s why we also offer custom-cut foam inserts for curved quadrant cushions — matching the radius and depth you need for a crisp, snug finish.
You can choose from:
High-density foam – firm and structured, perfect for supportive seating
Reflex foam – softer and more forgiving for relaxed areas
To top it off, we can wrap your foam in Stockinette or Dacron to plump it out and smooth the fit inside your new cover.
Getting the curve right is only half the battle — keeping it in place is just as important. That’s why we offer a few extra options that make all the difference:
Choose your zip location for simple access
Add a non-slip base — perfect for boats or smooth bench seating
Include Velcro tabs, ties or fixings to hold everything neatly in place
And yes — every cover is fully removable and washable, so cleaning up is quick and easy.
When the foam’s still good and the shape’s still right, why start from scratch? A new cover can give your curved quadrant cushion a fresh lease of life — without wasting money or creating unnecessary waste.
Especially for curved cushions, which are near-impossible to find replacements for, a custom cover is simply the smarter choice.
We’ve made it easy to get a spot-on result the first time. Here’s what to do:
Choose your units — mm, cm or inches
Enter your cushion’s depth, radius, and straight edge measurements
Pick your style and fabric, then add any extras
Add special notes — zip placement, fabric combo, front-facing side, etc.
Click “Add to Cart” — and we’ll get cracking
Need help with measuring? Just ask — we’ll walk you through it.
At Foam4U, we specialise in shapes that other suppliers avoid. From curves and corners to cut-outs and slopes — we’ve seen (and covered) them all.
With a combination of traditional craftsmanship, precision tools, and years of hands-on experience, we produce covers that fit perfectly and last properly.
So whether it’s a bow seat, a camper corner or a window nook — your Curved Quadrant Cushion Cover is in safe hands.
Made to measure.Made to match.Made in the UK.
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