Description

Available Foam Types

Frequently Asked Questions

What are foam trapezoids used for?

The most common use of a foam trapezoid is dining room chair cushions. Most dining room chair cushions are less wide in the back and wider in the front. Normally a dining room chair cushion in a trapezoid shape is one or two inches thick.

Trapezoid foam is also used in bay windows, again, because the back width isn’t as wide as the front width. Some bay windows require three cushions that could be a combination of three trapezoids if the sides butt up at a forty-five-degree angle.

Another use is in automobiles. Manufacturers of automobiles have made their seats uncomfortable and too low in height for the average user. Trapezoid foam cushions can be used as car seat foam padding to elevate the driver while providing comfort.

What is the most common foam used in foam trapezoid shapes?

Qualux and High Resilience foam for dining room chair pads are the most comfortable and longest-lasting foams available. In dining room chair seat padding, Qualux and High Resilience foam perform best in a firm firmness at two inches thick. This will provide excellent support and should prevent the cushion from bottoming out. For heavier-set people, the firmness should be increased from firm to extra firm to prevent the cushion from bottoming out.

Bay window foam padding is not used as often as dining room chair seat foam, making the High-Density foam type a more commonly used foam. This foam provides good comfort and support at an economical price point. If the bay window cushions are often used, then High Resilience foam would still be the recommended choice. Bay window foam padding in High-Density foam is also best in a firm firmness at two inches in thickness and extra firm for heavier set users.

More Information

Foam Type Recommendations

There are many different foam types available and it can be difficult to decipher which is appropriate for your application. Each foam has common uses but no foam is all-encompassing. Here is a quick overview of the various foams available:

Qualux Foam: A grade above High Resilience foam. Premium quality foam that is used in top-end upholstery cushions and mattresses.
High Resilience Foam: A grade above Lux foam. Excellent quality foam that is used in top-end upholstery cushions and mattresses.
Soft Foam: Excellent quality very soft foam at an ILD 10. It will provide similar softness to Memory foam but will have the bounce-back of High Resilience foam.
Lux Foam: A grade above High Density foam. It is a very good quality foam for mattresses and cushions.
Blue Foam: A Grade above Conventional Foam. Good quality foam with a blue color aesthetic. Good price-to-performance ratio for mattresses and cushions.
High Density Foam: A grade above Conventional foam. Good price-to-performance ratio for mattresses and cushions.
Conventional Foam: A grade above Polyurethane foam. Inexpensive medium-quality foam that is recommended for backing cushions or mattress toppers.
Polyurethane Foam: The cheapest foam we offer. Low-quality foam that is typically reserved for protecting items in storage or during transportation, packaging and shipping, arts and crafts, and other recreational applications.

Outdoor:

Dry Fast Foam: Often used in outdoor furniture and air and water filters because of its open-cell porous construction.

Premium Specialty:

Rebond Foam: Resilient and durable foam, making it ideal for carpet padding, motorcycle seats, and other high-usage applications.
Dunlop Latex Foam: Premium quality Dunlop Latex rubber foam that is used in top-end mattresses and cushions, providing excellent comfort, airflow, and durability.
Hard Foam: With a 240 ILD and 4.50 density, our Hard foam is engineered for demanding applications that require unparalleled rigidity and stability.
Gel-Infused Memory Foam: Excellent quality foam that has enhanced cooling properties compared to traditional Memory foam.
Memory Foam Premium: Excellent quality foam that is often used in foam mattresses because of its pressure relief.

Specialty:

Memory Foam Standard: Offers a balanced combination of support and comfort at an affordable price.
Memory Foam Light: With a density of 1.50 lb/ft³, our Memory Foam Light is ideal for those needing memory foam properties at an affordable cost.
Rebond Foam Light: Rebond Foam Light is a versatile and durable material for various applications such as gym mats, carpet underlayments, and seating cushions where moderate support is necessary.
Charcoal Foam: A grade above Charcoal Light Foam. Often used for packing and shipping, foam insert for cases, acoustical damping, and more.
Charcoal Light Foam: A cost-effective solution for protecting delicate items such as instruments, technical equipment, guns, computers, and other components.

We offer a more in-depth analysis of the foams listed above here.

Foam Density and ILD Values

You can view the density and firmness (ILD) values of the foam we offer here.

Foam Certifications

Most of our foam is CertiPUR-US® certified. CertiPUR-US® approved foam is made without ozone depleters, PBDE flame retardants, mercury, lead, and other heavy metals, formaldehyde, and phthalates regulated by the Consumer Product Safety Commission. They are Low VOC (Volatile Organic Compound) emissions for indoor air quality (less than 0.5 parts per million).

The foam listed below is CertiPUR-US® Certified:

Learn more here.

Foam Lamination

We offer foam lamination services. Laminating foam consists of permanently bonding foam layers together through adhesion. Foam lamination is widely used in the foam mattress industry, allowing for a customizable mattress solution.

To request this service, write your foam lamination preferences in the notes box during checkout.

Dacron Wrap

We offer Dacron wrapping services. Dacron wrap is a layer of polyester batting placed around upholstery foam to enhance the comfort and appearance of cushions. This wrap is applied around the foam core before upholstering, providing extra softness, maintaining loft, and contributing to the overall durability of furniture cushions. Its smooth and resilient nature makes it popular in creating a polished and comfortable seating experience.

To request this service, write that you want your foam wrapped in Dacron in the notes box during checkout. To qualify for our Dacron wrapping services, you need to have a sufficient quantity of Dacron and a can of Spray Adhesive in your cart during checkout.

Maximum Foam Dimensions

Foam has a maximum dimension in which it is produced, known as a bun or slabstock. Foam ordered beyond its maximum dimension will be divided to achieve the desired measurement. Based on our current available stock, it may or may not be adhered together before shipment.

The following are the bun sizes of our foam:

4 reviews for Trapezoid Foam

Rated 5 out of 5

Kona kustom upholstery – December 30, 2025

Ordering foam can be a bit of work if you’re not sure what you need but working with Josie and team make it a breeze to find the right size and type of foam
for any projects
We highly recommend foam online for all your foam needs
Rated 5 out of 5

Forest Roark – March 20, 2026

I NEED THIS FOAM TO FINALIZE MY TABLE CUSHION SEAT
Rated 5 out of 5

Forest Roark – March 20, 2026

i NEED THIS FOAM TO COMPLETE MY LAST CUSHION ON MY DINING SEAT
Rated 4 out of 5

Anonymous – March 20, 2026

I NEED A TRAPAZOLD CUSHION FOAM 27″ IN LENTH SIDES 17″ AND FRONT 4.5″