Pure Green 100% Natural Latex Mattress Topper - Medium Firmness - 1" Twin Size Latex Provides Amazing Pinpointed Support - Sleep Better Instantly 100% Natural Latex - No Synthetic Latex - No Fillers Medium-Firmness - Great for anyone who wants pinpointed support from a somewhat firm topper (Firmness rating is 30 ILD) 5.0 lbs/cubic ft Latex Foam Naturally Stays Cool 30 ILD (A Measurement of Firmness) 5 Lbs/ Cubic Ft (Density)