Ultimate Sleep Full - 3 Inch Natural Latex Foam Mattress Pad Topper - Medium Soft 3-inch Medium-Soft Latex Mattress Pad - Medium Soft density latex is 4.7 lbs, ILD of 16  18 lbs. Superior Orthopedic Support 100% Natural Latex--the most natural latex found anywhere, Dunlop latex. Ultimate Sleep's most popular density for those who are looking for a natural alternative to a memory foam mattress. Ultimate Sleep Brand Latex Sold by Ultimate Sleep Certified 100% Natural