Mattress Size Foam, Twin or Long Twin Thickness:4 inches Super Firm Quality Foam is

Super Firm Quality Foam is designed for heavy traffic

Ideal for camper cushions

Premium grade with high resilience is best for bench seats or hard mattresses

5 : Compression 36 - Best Medium Firm or Compression 45 - Best Quality Firm

Mattress Size Foam, Twin or Long Twin Thickness:4 inches Super Firm Quality Foam isPre cut to fit your bedding needs: Twin 39'' x 75'' or Long Twin 39'' x 80'' Available in various thickness and grades. Cover not included. Good Poly Foam is an economical all purpose foam. Acceptable for occasional use. Off white color. Not Fire Retardant. Density 1. 5 : Compression 44 Good Firm Poly Better Angel Foam, residential grade, is longer lasting than Poly. Off white color. Not Fire Retardant. Density 1. 8 : Compression 36 Better Firm Angel