1.5-Pound Density 4-Inch Memory Foam Mattress Topper, Twin 4 Inches thick, 1.5 pound density Space Age memory foam supports head to toe Adjusts to your shape for maximum comfort Hypo-Allergenic Measures 34 by 72 by 4 SleepBetter is registered in the U.S. Patent and Trademark Office 4 Inches thick, 1.5 pound density Space Age memory foam supports head to toe Adjusts to your shape for maximum comfort Hypo-Allergenic Twin measures 34 x 72 x 4 Made in the USA SleepBetter is a registered Trademark of Carpenter Co.