Mattress in a Box

A mattress in a box is a full-size mattress that has been compressed, rolled and sealed in plastic so it ships by parcel carrier instead of on a freight truck, then expands back to its normal height once you cut the wrap. The packing changes how the mattress arrives, not what it is: inside the box it is the same foam, or foam over coils, you would find in a showroom. Viscosoft's Edge ships this way, with a cutter in the box, and unrolls to a 12-inch mattress with a 3-inch comfort layer you can later unzip and replace.

Yes, as long as the mattress was designed to be compressed. Memory foam and pocketed coils both recover from rolling, so the box takes nothing away from the bed, and what separates a good one from a poor one is the same as for any mattress, the thickness and density of the comfort layer and the quality of the base. Where they fall short is at the end of their life: most are glued into one block, so a softened top means a new bed. The Edge avoids that with a replaceable comfort layer, and our guide on topper or new mattress covers a boxed mattress that has already sagged.

There is no single best mattress in a box, because the right one depends on how you sleep, but four checks sort the good ones from the rest: a comfort layer of at least 3 inches, a base that suits your weight and sleep position, a trial of 100 nights or more, and some way to change the feel if you got it wrong. On firmness, a Lancet trial of 313 people with low back pain found medium-firm beat firm over 90 days, so both Edge mattresses come in medium-firm or plush and let you swap between the two. Both are in the mattress collection.

Yes, most modern hybrids ship rolled and boxed like all-foam mattresses, because pocketed coils are individually wrapped and can be compressed without bending the springs out of shape. Older innersprings with coils wired together cannot be rolled, so they still arrive flat on a truck. The Edge Signature hybrid, with pocketed coils under 2.5 inches of firm foam and a 3.5-inch memory foam comfort layer, arrives rolled and boxed, as does its all-foam version. The Sleep Foundation notes that hybrids tend to sleep cooler than all-foam models, which is the main reason to pick one.

Carry the box into the bedroom before you open it, since the mattress is far easier to move rolled than expanded. Place the roll at the foot of the bed frame, cut the plastic seal with the cutter in the box, keeping the blade away from the fabric, unroll the mattress with the cover's white side facing up, and finish unwrapping the plastic as it expands. Give it time to reach full height, then put a mattress protector on before the sheets. Our compressed mattress guide covers how long expansion takes and whether you can sleep on it the first night.

Open it as soon as you can, and do not leave it rolled for months. The Sleep Foundation notes that boxed mattresses are usually meant to stay rolled for only one or two months, and foam compressed longer than the maker intended may not recover its full height or may expand unevenly. If you are buying ahead of a move, time delivery for after you arrive rather than storing the box. Check the brand's own window, and if a mattress comes out of long storage with a dip, contact the seller before the trial runs out.

You do not put it back in the box. Once a mattress has expanded it cannot be re-compressed at home, so returns on boxed mattresses work by pickup or by the seller arranging local donation or disposal. Read the trial terms first, since some brands require a minimum number of nights and some charge a pickup fee. Both the Edge and Edge Signature carry a 120-night trial, and the steps for starting a return are on the returns page. If the problem is feel rather than support, a replacement comfort layer in the other firmness is a smaller fix than a return.

No, not if it is unrolled within the maker's window. A boxed mattress lasts as long as the same mattress shipped flat, which the Sleep Foundation puts at 6 to 7 years for foam and 6.5 to 7.5 years for a hybrid. What wears a mattress out is the top few inches softening where you sleep every night, while the base underneath keeps going. A glued boxed mattress gets replaced whole at that point; on the Edge the comfort layer unzips, so you replace only the worn part. Our article on back pain and an old mattress lists the signs that a mattress is done.

Not a standard twin, which is 38 by 75 inches. Viscosoft's smallest mattress is the twin XL, at 38 by 80 inches, the 5 inches longer size used in college dorms and split king setups, and it ships rolled and boxed like the larger sizes. It takes twin XL sheets rather than twin. If you are shopping for a dorm, our article on dorm mattresses explains what the school usually provides, and the twin XL mattress collection has both Edge models in that size.

Not from Viscosoft. A full mattress is 54 by 75 inches, and the Edge and Edge Signature come in twin XL, queen and king only. If you were considering a full for one adult, a queen adds 6 inches of width and 5 inches of length for a bed frame only slightly larger. If the room will not take a queen, a twin XL gives one person the full 80-inch length in a 38-inch footprint. Both sizes arrive rolled and boxed with a 120-night trial.

Only on a modern one that is solid or has closely spaced slats. A foam or hybrid mattress in a box needs a flat, even surface, and an old box spring with actual springs inside gives too much and lets the mattress sag between the supports. Platform beds, solid foundations and closely slatted bases all work, and queen and king frames need a center support beam. The wrong base can also affect warranty coverage, so check the terms before you set up. Our guide to the best foundation for a memory foam mattress goes through each option.