Standard uses for these products can be seen on the What You Need page. These recommendations are based on number of factors including: how much use the item might expect, the characteristics of the foam, and the price of the foam.

All sheet foam can be cut with electric carving knife.

Rain-Thru: Rain-Thru polyether-polyurethane outdoor foam dries in minutes after exposure to rain, salt spray, melting snow, morning dew, washing, or other forms of moisture
The large, open cells of this reticulated foam (when covered with an open-weave fabric) allow water to pass right through the cushion and offer improved air circulation.
Rain-Thru offers strength and durability for long term exposure to sun and bad weather, yet provides the seating comfort of a medium firm foam.
This foam has odor and stain retardant properties due to a fungicide added during manufacture which inhibits fungus, mold, and mildew.
Rain-Thru is inherently resistant to most chemicals, including cleaning agents, solvents, alkalies, and acids (bleach may cause rapid discoloration).
Density of 1.2 and a compression of 36 pounds.

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High Compression Pro 85: Ideal foam where space is limited and firmness or support are needed required.

Designed for high use commercial applications; i.e. slot seats, bar stools, churches, hotels, movie theatres, etc. Ideal for weight lifting equipment, high performance boat cockpits, medical positioning wedges, and anywhere space is tight and a super firm feel is required. Light Blue Color. Inherently Fire Retardant (Cal code 117).

Density 2.6 Compression 85 (ILD)

108" sheets, thickness 1" to 6.5" , varied widths.