How durable are pocket spring cushions?

Most pocket spring sofas use 1.8 density polyurethane foam as the border around the fabric covered coil springs.

• This is also, by far, the most common foam used for all-foam sofa cushions.

1.8 density foam sofa cushions often wear out and lose their resiliency, shape and comfort within 5 years or less.

When used with pocket springs, however, 1.8 density foam lasts far longer.

• The bulk of the sitter’s weight will be on the springs rather than the foam.

A good quality pocket spring cushion (with a 1.8 density foam border) should last 10 - 15 years or more. 

The photo shown above is the Serenity Seat Cushion System from Leggett & Platt.