Types of Cushion Inserts

High-Density Polyurethane Foam

High-Density Polyurethane Foam is a traditional foam option that is suitable for seating and mattress applications. Polyurethane foam soaks up water when it gets wet, but the antimicrobial (sometimes called “biocide”) treatment on the foam helps to prevent the growth of mold and mildew as the foam dries out. The higher density makes this foam more resilient, and therefore more suitable for every day, high-traffic uses. This foam is best for upholstery seating, such as sofa cushions, and for interior settee and berth cushions in dry boats.

High-Density Polyurethane Foam is available in soft, medium and firm levels and typically lasts up to 12 years.


Fiber Sheet (Compressed Polyester)

This is not actually foam, but rather densified polyester batting that creates an effective foam alternative, which is mildew resistant and non-allergenic. Compressed polyester will not disintegrate or yellow like traditional foam, but it will compress over time. This foam alternative is an inexpensive option and is best used for occasional seating like patio cushions, light use upholstery and playpens.

Loose Fiber (Polyester Fiberfill)

Like Compressed Polyester, Polyester Fiberfill is not truly foam, but rather blown polyester fibers. An affordable option, it is a common stuffing for pillows and deep seating back cushions. Generally, Polyester Fiberfill is stuffed inside a pre-sewn cover, which is then inserted into the cushion or pillow fabric to give support and shape. Fiberfill is nonallergenic and resistant to mildew. It is machine washable, but the fiber can bunch up in laundering. Use your hand to smooth it back out.

Dry Fast Foam (Reticulated/Open Cell Foam)

An open cell, low-density foam with open pores that allow water and air to flow through easily. Open cell foams make a comfortable and cool seating cushion or mattress. Dry Fast is a high-quality open-cell foam that is formulated with an antimicrobial agent to prevent mold and mildew. When paired with an outdoor cushion fabric or Phifertex Mesh, open cell foam creates a virtually maintenance-free cushion in sun, rain and snow. These traits also make this foam great for boat cockpit cushions.