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Serta
Serta Sea Heights 13" Extra Firm Tight Top Mattress

Serta Sea Heights 13" Extra Firm Tight Top Mattress

Last price we saw

$447.30at Macy's, last seen Oct 30

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Our take on the Serta Sea Heights 13" Extra Firm Tight Top Mattress

The Serta Sea Heights is a 13-inch innerspring mattress with a tight top and an extra-firm feel, built with gel memory foam over a coil support core. It is designed to work on adjustable bases, and it comes in six sizes from Twin to California King. Serta positions it as a supportive, low-sink option rather than a plush one. Shoppers comparing it should weigh the firmness against the return policy, since extra-firm beds are polarizing.

Best forBack and stomach sleepers who want little sinkHeavier sleepers needing coil supportCouples who dislike motion transfer from soft foamBuyers with an adjustable base
Pros
  • Extra-firm tight top resists body impressions
  • Gel memory foam layer adds pressure relief without much sink
  • 13-inch profile fits standard deep-pocket sheets
  • Innerspring core gives edge-to-edge support
  • Works with adjustable beds
  • Available in six sizes including Twin XL and California King
Cons
  • Too firm for side sleepers and light sleepers
  • Innerspring design can transfer motion between partners
  • No pillow top or plush option in this model
  • Gel foam layer is thin, so cooling benefits are limited
  • Firmness is not adjustable after purchase

Serta Sea Heights 13" Extra Firm Tight Top Mattress prices at every store

  • Macy'sCheck price at Macy's

Serta Sea Heights 13" Extra Firm Tight Top Mattress price history

Lowest price we've seen: $447.30 on Oct 30 at Macy's. Tracked across 1 store since Oct 30.

What reviewers say

Owner feedback on Serta's extra-firm tight-top models is mixed but leans positive among back and stomach sleepers. Most praise the support and lack of sagging; side sleepers often find it too hard.

Pros
  • Strong support for heavier sleepers
  • Holds shape well over time
  • Little sink at the edges
Cons
  • Too firm for side sleeping
  • Noticeable motion transfer
  • Takes time to break in

Specifications

Size
Queen, Twin, King, Full, California King, Twin XL
Type
Innerspring, Gel Memory Foam
Specialty Style
Adjustable Bed

Questions and answers

Is the Sea Heights good for side sleepers?
Usually not. The extra-firm tight top puts pressure on hips and shoulders for side sleepers, especially lighter ones. A softer topper or a plush model suits side sleeping better.
Does it work on an adjustable base?
Yes. Serta lists it as adjustable-bed compatible, so it bends with a power base. A rigid foundation or box spring is still fine for a standard bed frame.
How firm is extra firm compared with a medium mattress?
Noticeably firmer. Expect minimal sink and a flat, supportive surface. Back and stomach sleepers often like it; side sleepers frequently do not.
What sizes are available?
Twin, Twin XL, Full, Queen, King and California King. Twin XL suits adjustable bases and dorm frames.
Does it sleep hot?
The gel memory foam layer is thin, so cooling is modest. The innerspring core allows some airflow, but hot sleepers should pair it with breathable bedding.
When is it cheapest?
Mattress prices swing around holiday sales and model clearance. Track the price history here and compare across stores before buying.