Nectar Premier Copper Mattress Review (2026): The 13-Inch

Why you should trust this review

I bought this Nectar Premier Copper in the Queen size at full retail and have slept on it nightly for eleven months. Nectar did not provide it, did not know a review was coming, and has had no say in what I write here. That distinction matters with mattresses, because a bed that feels great in a showroom for ten minutes can feel very different at month eight when the foam has broken in and your body has decided whether it trusts the support.

I am a side and back sleeper who runs hot, which is exactly the buyer this mattress is built for. I came to it from an older all-foam bed that trapped heat badly, so I had a clear baseline for what the copper cover needed to fix. Everything below is what I actually noticed living with it, not a paraphrase of the spec sheet.

How we evaluated

I slept on the mattress every night for eleven months across a full year of seasons, which is the only way to judge a foam bed honestly. I tracked how hot I slept through summer with the bedroom at the same temperature it had always been, paid attention to the first one to two days of off-gassing, and noted how the foam felt at week one versus month eleven. I also checked the practical things buyers ask about: how it handled at the edge when I sat to put on shoes, whether motion from a partner shifting woke me, and how the 13-inch profile fit a standard headboard and existing fitted sheets.

Copper cooling cover: the real reason to buy this one

The headline feature is the copper-infused phase-change cover, and it is the part that earned its keep. My previous foam bed had me throwing a leg out from under the duvet by 2 a.m. most summer nights. On the Premier Copper, the surface stays noticeably cooler to the touch when you first lie down, and more importantly it does not build up that swampy trapped-heat feeling that plain memory foam is notorious for over the course of a night.

I want to be careful here: the cover does not make this a “cold” mattress the way an innerspring with airflow can feel cold. It is still foam, and foam cradles you, which limits airflow underneath your body. What the copper cover does is pull surface heat away faster than standard foam, so the sleeping surface resets between position changes instead of holding a warm dent. Over eleven months including a hot summer, I went from kicking the covers off nightly to sleeping through. That is a meaningful, livable difference rather than a marketing one.

Memory foam contour: support that holds at month eleven

The construction is four foam layers, a gel-infused dual-action comfort foam over a dynamic transition layer and a supportive base. In practice that means slow, even contouring. When I lie on my side, my shoulder and hip sink in enough to keep my spine straight, and the transition layer stops me from bottoming out into the firm base the way cheaper single-density foam beds do.

The thing I was watching for over the long haul was body impressions, and this is where the mattress reassured me. At eleven months there is no permanent dent on my side and no sag down the middle. The foam still rebounds to flat each morning. It is a medium-firm feel that reads slightly firmer when the room is cold and a touch softer when warm, which is normal foam behavior. Motion isolation is excellent, which is the quiet advantage of all-foam: a partner getting up or rolling over simply does not transmit across the bed.

Edge support and off-gassing: the honest trade-offs

This is an all-foam mattress, and that means the edges are softer than a hybrid with perimeter coils. When I sit on the side of the bed to tie my shoes, the edge compresses more than a coil mattress would, and if you sleep right up against the edge you will feel that you are nearer the drop-off. For most people sleeping toward the middle this is a non-issue, but if you share a smaller mattress and use every inch of surface, a hybrid with reinforced edges is the better structural choice.

The other honest note is the first one to two days. Like nearly all boxed foam, it had a mild off-gassing smell out of the wrapping. I let the bedroom air out, and by the second night it was gone and never returned. The 13-inch profile is worth flagging too: it suits a standard headboard and worked with my deep-pocket fitted sheets, but check your existing sheets because shallow-pocket sets will fight a 13-inch bed.

Who should buy the Nectar Premier Copper Mattress?

Buy it if you are a hot sleeper who has decided you want the cradling feel of memory foam rather than the bounce of coils, you sleep mostly on your side or back toward the middle of the bed, you value near-silent motion isolation for sharing with a partner, and you want a long trial to test it through a full season before committing. The 365-night window and the lifetime warranty mean you genuinely get to find out whether it works for your body, and the free white-glove delivery with old-mattress removal takes the worst chore out of the swap.

Skip it if you need firm edge support because you sit on the edge constantly or sleep right at the perimeter, you prefer the responsive lift of an innerspring or hybrid, or you are a heavier stomach sleeper who needs the extra pushback that coils provide to keep the hips from dipping. In those cases a luxury hybrid is the smarter structural match even at a similar price.

The verdict

Eleven months in, the Nectar Premier Copper has done the one thing I most needed a foam mattress to do: it stopped me sleeping hot, without giving up the contouring comfort that made me want foam in the first place. The copper cover is a real functional upgrade rather than a gimmick, the four-layer foam has held its support with no impressions, and the long trial plus lifetime warranty make it a genuinely low-risk purchase. The soft edges and the brief initial off-gassing are the costs of going all-foam, and they are easy to accept if cooling and motion isolation are your priorities. For a hot side or back sleeper who wants memory foam, this is the one I would point them to.