Re: [Amel Yacht Owners] Froli Sleep System
Bill & Judy Rouse <yahoogroups@...>
toggle quoted messageShow quoted text
FYI, memory foam (viscoelastic polyurethane foam) is manufactured in various qualities and some of the qualities are not worth having.
Fortunately there is a simple way for you to determine quality. Almost all foam is measured by density, or pounds per cubic foot. The minimum acceptable density is 4.0 pounds per cubic foot.
Before buying any piece of memory foam, check the weight in pounds, do the math LxWxH to determine cubic feet,, then divide the weight (pounds) by the cubic feet. If the answer is less than 4 pounds per cubic foot, it will not last long and will disappoint you.
Most memory foam mattresses have 2 to 3 inches of memory foam glued on top of 6 to 8 inches of regular polyurethane foam, making it impossible to do the math yourself, but you can do the math on "mattress toppers," those memory foam pads that you place on top of your mattress. BTW, the minimum acceptable quality of regular polyurethane foam is 3 pounds per cubic foot...anything less than 3 pounds will get too soft in a year or two.
On Sun, Feb 1, 2015 at 11:37 PM, Colin Streeter colin.d.streeter@... [amelyachtowners] <amelyachtowners@...> wrote: