Snuggle-Pedic Patented Double Layer 4lb. & 5lb. Density Viscoelastic Memory Foam Mattress Topper/Bed Overlay Pad with Reversible Comfort | Made in USA | Best 90-Day Refund Guarantee - Twin Size Patented Reversible Viscoelastic Memory Foam Comfort Allows the Snuggle-pedic to Adapt to Any Body Type & Offer Unprecedented Support. the 4lb. & 5lb. Density Double Layer Technology Gives a Much More Substantial Feel and Provides Conforming Memory Foam That Properly Supports the Spine for Side, Stomach, & Back, & Pregnant Sleepers - 2 Inch Thick, Double Layer Design Composed One Inch of Top Quality, U.s.a. Made 4lb. Density Memory Foam, Over One Inch of 5lb. Density Viscoelastic Memory Foam Gives The Feel of a Memory Foam/Gel Topper that is Much Thicker, Only Easier To Move Around On and More Supportive 5lb. Density Side Offers Twice the Support Of the 4lb. Density Side and Helps Prevent The Softer 4lb. Memory Foam from Bottoming Out. It Costs Us Nearly 3 Times the Amount To Use The Better Quality Memory Foam Layers that make the Snuggle-Pedic a FAR SUPERIOR PRODUCT! Hypoallergenic & Dust Mite Resistant. Rolled & Vacuum Sealed For Eco-Friendly Shipping. that is CertiPur Certified to be foam MADE WITHOUT ozone depleters, PBDE flame retardants, mercury, lead and other heavy metals, formaldehyde, without phthalates regulated by the Consumer Product Safety Commission and Low in VOC (Volatile Organic Compound) emissions for indoor air quality (less than 0.5 parts per million) 90-day No Hassle Refund Guarantee. Higher Density Foam Allow For INDUSTRY LEADING 10-Year Warranty!