---
title: "Split Tension vs Zip-and-Link Mattress | BedGuide"
description: "Split tension vs zip-and-link compared: one dual-firmness mattress versus two joined mattresses — stairs, types, centre join and when each build fits."
url: "https://bedguide.co.uk/compare/split-tension-vs-zip-and-link/"
---

mattresses comparison

#  Split tension (one mattress) vs Zip-and-link (two mattresses)

Evergreen URL: /compare/split-tension-vs-zip-and-link

In short

  A split tension mattress is one unit with two firmness or spring-tension bands. A zip-and-link bed is two mattresses joined with a zip. Split tension looks like one bed. Zip-and-link can mix types and go up stairs in two pieces. Ask which build you are buying before you compare shop labels.

     Split tension (one mattress)

    Zip-and-link (two mattresses)

UK shops sell both ideas to couples who do not share a firmness band. The words dual firmness and half-and-half are catalogue names. They are not a British Standard. This comparison is about construction, not brand rankings.

##
What is the difference between Split tension (one mattress) and Zip-and-link (two mattresses)?

  A split tension mattress is one unit with two firmness or spring-tension bands. A zip-and-link bed is two mattresses joined with a zip. Split tension looks like one bed. Zip-and-link can mix types and go up stairs in two pieces. Ask which build you are buying before you compare shop labels.

| Criterion | Split tension (one mattress) | Zip-and-link (two mattresses) |
| --- | --- | --- |
| How many mattresses | One mattress with two bands | Two mattresses joined with a zip or link |
| Can types differ | Usually no — one stack, two tensions or feels | Yes — each half can be a different construction if sold that way |
| Stairs and landings | One large object — Super King may not turn | Two smaller objects — often two Singles |
| Centre join | Built into one quilt | A zip; a bridge pad can soften it |
| UK size you buy | One plan, e.g. King 150 × 200 cm | Two plans that add up, e.g. two 90 × 190 cm into Super King width |
| Dual adjustable base | Only if the whole unit can flex | Each half can sit on its own motor if the maker allows |

##
Who is Split tension (one mattress) for — and who should skip it?

- You want one cover and one look
- Stairs can take the full plan size
- You only need two tension or feel bands, not two constructions

  [Full Split tension (one mattress) guide →](/mattresses/split-tension-and-dual-firmness/)

##
Who is Zip-and-link (two mattresses) for — and who should skip it?

- You need two constructions, not only two tensions
- A Super King will not turn on the landing
- You want halves you can replace or move apart later

  [Full Zip-and-link (two mattresses) guide →](/mattresses/couples-and-zip-and-link/)

##
Frequently asked questions

###  Is dual firmness the same as zip-and-link?
  Usually no. Dual firmness and split tension normally mean one mattress. Zip-and-link means two. Ask how many units you are buying.

###  Which is better for different body weights?
  Both can assign different support to each sleeper. Zip-and-link can also mix types. Split tension keeps one cover. Neither is a medical treatment.

###  What size is each half of a split tension King?
  It is still one 150 × 200 cm mattress. The join is inside that plan. It is not two Singles unless the ticket says zip-and-link.

   **Educational comparison only.**
BedGuide does not sell beds or mattresses and does not recommend brands.
      Last reviewed 2026-08-28.

  [← All comparisons](/compare/)

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Source: https://bedguide.co.uk/compare/split-tension-vs-zip-and-link/ · BedGuide — educational encyclopedia, no affiliate commission. See https://bedguide.co.uk/editorial-policy · Report an error: https://bedguide.co.uk/corrections.