Foam Series: Comparing Types of Upholstery Foam
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In this guide, we’ll break down the most popular foam types available at Sailrite®, as well as two important padding materials: Polyester Fiberfill and Polyester Batting. You’ll learn the properties of each foam, how they perform in various conditions and where they’re best used.
Tip: For a quick comparison, download our Cushion Foam Buying Guide PDF to reference foam features, densities and uses at a glance.
Types of Cushion & Upholstery Foam
Polyester Fiberfill
Although not technically a foam, Polyester Fiberfill is a budget-friendly pillow and cushion stuffing made from blown polyester fibers. It’s commonly used to fill deep seating back cushions and pillows, providing softness and shape. Fiberfill is typically stuffed inside a pre-sewn cover made from Spun Bonded Pillow Protector Fabric, then inserted into the cushion cover.
- Nonallergenic and resistant to mildew.
- Machine washable (but may clump — smooth it out by hand).
- Not suitable for seating bases or load-bearing use.
Recommended Uses:
- Throw pillows
- Back cushions for sofas and deep seating
- Decorative bedding pillows
Polyester Batting
Polyester Batting is a thin, nonwoven layer of polyester fiber used to add softness and smoothness to cushion foam. It’s often wrapped around foam cushions to eliminate sharp corners and give a more polished, rounded look to the finished cushion. Batting is also used between the foam and the fabric to prevent wear and extend cushion life.
- Lightweight and resilient.
- Can be glued or sewn.
- Adds comfort and a professional appearance to finished cushions.
Recommended Uses:
- Wrapping around cushion foam before upholstering
- Padded furniture arms and backs
- Quilted sewing projects
CushionRite® Standard Antimicrobial Foam
CushionRite Standard is a medium-density polyurethane foam treated with antimicrobial agents to resist mold and mildew as it dries. Though it will soak up water, this foam is safe for occasional outdoor use if wrapped in a waterproof barrier like Cushion Wrap Silk Film.
- Medium firmness ideal for occasional seating.
- Antimicrobial protection helps inhibit mold growth.
- Should be kept dry or wrapped in waterproof material.
Recommended Uses:
- OEM-style boat cushions
- Patio furniture
- Indoor occasional-use seating
Shop CushionRite Standard Antimicrobial Foam
CushionRite® Premium Foam
A step up from the Standard version, CushionRite Premium foam offers higher density (2.8 lb/ft³) for longer-lasting performance and better support. It’s available in firmness levels from extra soft to extra firm, making it ideal for customizing your comfort level. The Premium (Firm) version is antimicrobial, just like CushionRite Standard foam.
- Long-lasting — typically up to 12 years
- High density means more support and durability
- Ideal for high-use indoor seating
Recommended Uses:
- Sofa and chair cushions
- Settees and berths on dry boats
- RV seating and mattresses
- Window seats and benches
CushionRite® Dry Fast Antimicrobial Foam
CushionRite Dry Fast is a high-quality, open-cell foam designed to let water and air pass through freely. It’s your go-to for outdoor and marine seating thanks to its fast-drying design and antimicrobial treatment. This foam comes in soft, medium and firm options for tailored comfort.
- Open cell structure drains water quickly.
- Antimicrobial to resist mold and mildew.
- Perfect for outdoor environments.
How to Spot the Real Deal: Pour water on your Dry Fast Foam — it should run straight through. If water rolls off the sides, it’s not authentic Dry Fast.
Recommended Uses:
- Boat cockpit cushions
- Poolside and patio furniture
- Outdoor bench and lounge cushions
- Wet environments like outdoor showers or beach cabanas
Shop CushionRite Dry Fast Antimicrobial Foam
CushionRite® Flotation Antimicrobial Foam
Made from PVN, CushionRite Flotation Foam is a closed-cell foam with zero water absorption. It’s ultra-buoyant and three times firmer than polyurethane foam, making it ideal for applications where flotation is critical or durability is key.
- Closed cell foam — completely waterproof.
- Very firm support.
- Can be used with any cover fabric without water concerns.
Pro Tip: Use thin Flotation Foam under Dry Fast Foam for added support. Drill drainage holes in the Flotation Foam to allow water to pass through.
Recommended Uses:
- Flotation cushions and life vests
- Commercial boat seating
- Bosun's chairs
- Marine step cushions
Shop CushionRite Flotation Antimicrobial Foam
Fabric Backed Sew Foam
Also called scrim foam, Fabric Backed Sew Foam is a thin layer of foam with a spun-bonded polyester backing. It’s not used for cushion support but rather for padding and decorative effects in upholstery.
- Easy to glue and sew.
- Creates pleats, channels, and quilted textures.
- Adds padding and polish to hard surfaces.
Fabric Backed Sew Foam is available in 1/2" and 1/4" thicknesses for different upholstery and craft needs. The 1/4" version is especially good for bags and soft-sided projects.
Recommended Uses:
- Upholstered seating (e.g., pontoon, motorcycle, golf cart)
- Marine coaming pads
- Quilted bags and purses
- Vehicle and RV headliners
Need Help Choosing Foam?
Still not sure which foam is best for your cushion project? Our blog post, “Choosing the Best Foam for Cushions — 5 Key Terms to Know,” breaks down the key terminology so you can shop with confidence.
Ready to start your next upholstery DIY? Shop our wide selection of upholstery foam here.
