The heavy duty foam is a 2 lb dense support foam rated for heavy duty use such as everyday seating and/or sleeping. We use a firm foam so you get a great support. This foam is rated for 8 to 10 years of life based on everyday use by an average adult.
 
Sizes:
Twin: 39" x 74"
Twin XL: 39" x 80"
3/4: 48" x 74"
Double: 54" x 74"
Queen: 60" x 80"
King: 76" x 80"