THIS 8 INCH MATTRESS WITH TWO INCHES OF MEMORY FOAM IS FOR THE RV OWNERS THAT HAVE A LIMITED SPACE TO PUT YOUR MATTRESS BUT WANT A MEDIUM COMFORT Medium Comfort means not too firm and not too soft Medium comfort with reduced motion transfer lets you sleep deeper, better and longer The Narrow King measures 70" x 80" Inches...custom sizes available...search for Travel Happy Custom Size Request to find our custom listings.