Hi Geraint,

Thanks for your comment about your sagging Dunlopillo mattress. The issue with one sided mattresses like you have discovered is they can sag and dip rather quickly.

As you can't turn them there is no way to even out this settlement once it happens. All the wear happens on one side. Apart from adding additional latex toppers to reduce this there's nothing you can do once the sagging or dip has occurred I'm afraid.

You could get in touch with Dunlopillo about getting an inspector if it is still in guarantee to come and check the mattress? It may have failed though in all likelihood at 16 stone and being an edge sleeper it would probably be found as natural settlement for a one-sided mattress.

Avoiding mattress settlement and dips

The best bet to avoid this kind of mattress settlement is to choose a 2 sided mattress and turn it over monthly plus rotation every 2 months of so. That way all the wear is dispersed on all parts of the mattress preventing or drastically reducing dips. With a zip and link. At 16 stone you're on the cusp of a 1.6 gauge firm spring. You can find out more on why spring tensions are chosen based on your weight in the video guide below.

Can one half of a zip and link mattress be replaced?

Unfortunately no you would need to replace both. This is because zip and links are made as a pair and then the zips are perfectly matched. If you were to replace on side the likelihood of matching the zips to a previous bed, that will have already settled naturally would be almost impossible. However, if you're turning both sides of the mattress then you shouldn't need to replace one half before the other, especially if you're swapping both sides over each month when you turn.

Zip and links do make it much easier to turn mattresses and also they have less issues with central settlement - the part of the mattress that most people don't sleep in. In one piece mattresses, especially super kingsize, this can occur as people don't sleep there so a ridge can develop over years. This doesn't happen with a zip and link as both sides can be used and you have more options for turning.

What's a B Grade Mattress?

Our clearance reduced mattresses are in the clearance for only two reasons:

1. Returned under the 60 Day Love it or Return it
2. Cosmetic damage in transit or failed delivery

Grade	Discount	Description
B	20%	Will have been used by a customer and returned under the 60 night love it or return it guarantee, it may have a few marks from transit and courier handling.
C	40%	Will have been used by a customer and returned under the 60 night love it or return it guarantee, it will have quite a few marks and could even have a small tear, nothing detrimental to the life or use of the mattress.

If you have any more questions please get back in touch with us on 0161 437 4419.

All the best John & Ryan