Most common choice

Average life span of 7 years

Comfortable

Not recommended for cushions less than 3” tall.

Softer than standard, but still supportive

Personal favorite for heavy use

Recommended for cushions 1-2” thick

Less supportive

Recommended for very thick or very large cushions

Very firm

Takes quite a bit of weight to compress

Best on single seat cushions

For outdoor use

Open-cell foam (water drains right through it)

Firm