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The SIMENMAX is a 3-inch tri-fold mattress topper built on gel memory foam over a support base foam, with a breathable knit cover and a non-slip bottom. It unfolds flat as a Twin bed and folds into one or two sections to work as a lounger, seat or play mat. The gel layer is meant to sleep cooler than plain memory foam, and the foam is CertiPUR-US certified. It suits guest beds, dorms, RVs and camping where a real mattress won't fit, but at 3 inches it is a topper, not a replacement mattress, and side sleepers wanting deep cushioning should look at thicker tri-folds.
In stockSold by Lilymont IncReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
Ratings average 4.2 out of 5 across 96 reviews, with buyers generally satisfied with it as a portable spare bed. Complaints center on thinness and firmness rather than construction.
This is a tri-fold memory foam mattress in Twin size, 3 inches thick. It unfolds into a full sleeping surface. You can also fold one or two sections for other uses, such as a portable bed, play mat, lounger, sofa or extra seat. It folds and unfolds in a few seconds and stores in cabinets or tight spaces.
The top layer is gel memory foam, which regulates temperature. A support base foam gives full body support. The feel is medium firm and conforms to the body for pressure relief. It suits back, side and stomach sleepers. The foam is CertiPUR-US certified.
The cover is made of skin-friendly, breathable fabric. A center zipper lets you remove the cover and machine wash it. The bottom fabric is non-slip, so the mattress stays in place on the floor. It can be used at home, in a tent, in a car, in an RV or in a dorm or apartment.
