Upholstery Foam: Grades, Quality, and Selection

Upholstery foam is the most common and cost-efficient material used to provide comfort and structure to furniture cushions. Over years of use, cushions inevitably wear down, and replacing the internal foam core is a natural part of furniture upkeep.

This guide details the two premium foam series we offer, explains the two most critical characteristics—Density and Firmness (IFD/ILD)—and helps you understand our specific foam codes.

Our Premium Upholstery Foam Grades

We specialize in high-quality, long-lasting foam grades, ensuring your furniture remains comfortable for years.

1. HR Series (High-Resilience Foam)

   • Description: This is our standard premium foam. HR foam is significantly more durable and resilient than regular foam. It springs back to its original shape faster and maintains comfort longer.

   • Key Feature: All foams in this series are genuine High-Resilience quality, with densities starting at 2.5 pounds per cubic foot.

2. Q Series (Highest Grade Foam)

   • Description: This is our absolute best foam, designed for maximum lifespan and superior comfort. The Q Series offers higher density ratings, making it perfect for custom, high-end, or commercial projects.

   • Key Feature: Densities range from 2.6 pounds up to 3.0 pounds per cubic foot, offering unparalleled support and durability.

Foam Quality: Density (The Durability Factor)

Density refers to the mass of the material packed into a given volume. It is the primary indicator of a foam's quality and longevity.

A Higher Density = A Higher Quality and Longer-Lasting Foam. We only carry quality foam for lasting comfort:

• How it's Measured: Foam is rated by the weight, in pounds (lb), of one cubic foot of foam.

  • Example: Our HR2520 foam has a density of 2.5 pounds, meaning a one-cubic-foot block weighs 2.5 pounds. Our highest grade Q51 and Q61 foams weigh 3.0 pounds per cubic foot.

1. 2.5 lb to 3.0+ lb: High-Resilience (HR) Quality. This is the grade we carry and recommend for extensive, daily use.

Foam Comfort: Firmness (IFD/ILD)

Firmness, also known as Indentation Force Deflection (IFD) or Indention Load Deflection (ILD), measures how soft or firm a piece of foam feels. Firmness determines comfort, while density determines durability.

• How it's Measured (IFD): The IFD measures the amount of downward pressure (in pounds) required to compress a 4-inch-thick piece of foam to 75% of its original size (compressing it to 3 inches).

  • Example: Our HR2533 foam has an IFD range of 30-36, meaning it takes 30 to 36 pounds of pressure to compress the foam sample by one inch.

IFD Ratings of Our Grades (Softest to Firmest)

1. HR2516 (Soft Gold HR): 13 to 19 IFD – Excellent for soft back cushions or light padding.

2. HR2528 (Medium Gold HR): 25 to 31 IFD – A comfortable, yielding seat or firm back cushion.

3. HR2542 (Firm Gold HR): 39 to 45 IFD – Our most popular choice for long-lasting support and general seating.

4. Q51 (High Quality Extra Firm Yellow): 51 to 61 IFD – An extremely firm, high-density option for commercial or specialized seating.

Reading Our Foam Codes

Our foam codes are easy to read and clearly communicate the density and firmness rating of the product.

Example Code: HR2533

Example Code: Q35

The Q Series uses a simple code focused on the IFD range, with the density for the series listed in the product specifications (e.g., Q35 is a 2.6 lb density).

We carry samples of all these grades and are happy to help you select the perfect foam based on your furniture's use and your preferred feel.