Explore top 4-inch-thick foam padding options designed for upholstery, cushions, and DIY projects. This guide highlights five reliable foams from reputable brands, focusing on density, firmness, durability, and US-made options. Each product includes a direct Amazon link, size details, and notable features to help you compare for your next upholstery or packing project.
Summary Table
| Product | Brand | Size | ILD / Density |
|---|---|---|---|
| GoTo Foam 4″ x 24″ x 72″ Cushion | GoTo Foam | 4″ H x 24″ W x 72″ L | 44 ILD, 1.79 Density |
| FoamTouch 4″ x 24″ x 72″ Charcoal | FoamTouch | 4″ H x 24″ W x 72″ L | Unknown explicit ILD; high shock-absorbent properties |
| GoTo Foam 4″ x 24″ x 96″ Cushion | GoTo Foam | 4″ H x 24″ W x 96″ L | 44 ILD, 1.79 Density |
| AKTRADING CO. 4″ H x 30″ W x 72″ L Cushion Sheet | AK TRADING CO. | 4″ H x 30″ W x 72″ L | 1.8 lb density, 44 ILD |
| FoamyFoam High Density 4″ Thick | FOAMYFOAM | 4″ H x 24″ W x 24″ L | 1.8 Density, 44 ILD |
Notes: ILD stands for indentation load deflection, indicating firmness. Density reflects material mass per volume and relates to support and longevity. For packaging and DIY seating, consider how easy the foam is to cut, as well as whether the product is US-made or Certipur-US certified.
GoTo Foam 4-Inch Upholstery Cushion 72 Inches
GoTo Foam offers a 4″ thick cushion with a 44 ILD firmness and a density of 1.79, designed for upholstery and long-lasting comfort. Made in the USA and Certipur Certified, this cushion is suitable for sofa seats, chairs, and custom builds. The 72″ length provides ample material for multiple configurations, with a balance of support and resilience to resist sagging over time.
FoamTouch 4″ Charcoal Foam
FoamTouch Charcoal 4″ foam emphasizes protection for fragile items with shock-absorbent properties, making it suitable for packaging and shipping applications. It is described as stain- and impact-resistant, designed for durability in demanding environments, and easily cut into custom shapes with common tools for tailored fits. This option supports projects that require customized thickness and contours while maintaining resilience.
GoTo Foam 4″ x 24″ x 96″ Cushion
This GoTo Foam option shares the same US-made and Certipur Certified attributes with a longer 96″ length. It maintains the 44 ILD rating and 1.79 density, offering robust support for larger cushions or extended seating installations. The extended length reduces the need for seams in long cushions, promoting a clean, durable finish.
GoTo Foam 4″ Upholstery Cushion 72″ (Semi-Firm)
This 4″ thick GoTo Foam cushion uses a 35 lb compression profile with a 1.8 density, categorized as semi-firm. Made in the USA and Certipur Certified, it targets applications needing sturdy support without excessive hardness. The 72″ length is suitable for modular seating, matching projects where a comfortable yet resilient seating surface is desired.
AKTRADING CO. 4″ Foam Sheet Cushion
AK TRADING CO. offers a versatile 4″ thick sheet cushion sized at 30″ W x 72″ L. The foam has a 1.8 lb density and 44 ILD, designed for furniture cushions, boat and RV upholstery, and other DIY projects. The material emphasizes durability, stain resistance, and broad applicability—from professional upholstering to acoustic panels and packaging protection. It supports long-term use in busy settings while maintaining shape and comfort.
FoamyFoam 4″ High Density Cushion
FoamyFoam High Density Cushion presents a 4″ thick option with 1.8 density and 44 ILD, described as long-lasting and suitable for seat, couch, bench, and various upholstery replacements. The product notes that it can be cut to specific sizes and shapes, with customization options including thicknesses from 1″ to 7″ and widths up to 48″ or lengths up to 120″ (subject to stock). This flexibility makes it valuable for custom builds and repairs.
FoamTouch Upholstery Cushion 4″ x 24″ x 72″
FoamTouch’s 4″ thick upholstery cushion in a 24″ x 72″ format is built to last, made in the USA with a claimed 7 to 10-year lifespan. It features a density of 1.4 and 44 lb compression, offering a balance of moderate firmness and long-term resilience—ideal for sofa cushions, chair padding, and back cushions where consistent support is important.
RaceCityFoam 4″ X 24″ X 80″ Ultra Firm
RaceCityFoam offers an ultra-firm 50 ILD option with 1.8 density for heavy-duty seating and reupholstering projects. CertiPUR-US certified, this cushion emphasizes high durability and a strong return to shape. It is designed for a variety of applications, including patio chairs, RV seats, and automotive cushions, providing robust support for high-usage environments.
Buying Guide: Key Purchase Considerations
- Intended use: Upholstery, seating, packaging, or acoustic applications each benefit from different densities and ILD ratings. For furniture, aim for 1.8–2.0 density with mid-range ILD (around 35–50) for balanced support and comfort.
- Firmness vs. longevity: Higher ILD and density typically yield firmer support and longer-lasting cushions, but can feel stiffer initially. Consider your comfort preference and project duration.
- Size and cutability: If custom shapes are needed, choose foams described as easy to cut or with flexible thickness options. Some products offer cutting guidance or quotes for specific sizes.
- Certipur-US and safety: Certifications indicate foam meets certain standards for emissions and content, which is important for indoor air quality and child-friendly projects.
- Made in USA: For some buyers, domestic production supports local economies and may influence lead times and quality controls.
- Versatility: Multi-purpose foams (soundproofing, packaging, and padding) can offer more value if you need a single material for several tasks.