Mattress Online HydroShield Classic Mattress
Mattress
Mattress Online HydroShield Classic Mattress
Size
Firmness
Depth (cm)
10
Layers
Layer Details
- Ecofoam. A 10cm layer of Ecofoam made entirely from recycled materials, which means it supports a variety of body shapes while keeping waste out of landfill. It has natural rebound, so it returns to shape between sleepers rather than sagging where the last person lay.
Layer details from mattressonline.co.uk product page, September 2026.
- 75cm each for two sharing: Two people get 75cm of width apiece, which means fewer elbows and less of the drifting into each other that makes a double feel cramped.
- Natural rebound reduces disturbance: The Ecofoam core returns to shape between sleepers, so when one of you leaves for an early shift the other isn't left rolling into a dip.
- 200cm of length for taller sleepers: At 200cm long, the UK king suits anyone approaching or over six foot whose feet reach the end of a standard-length bed.
- Wipe-clean cover at family scale: The water-resistant cover shrugs off spills across the full 150cm width, useful if a dog has claimed a corner of the bed as routine.
- A low-cost way to fill a king frame: For a rental or student let with a king bedstead, this is a simple, hard-wearing option that recovers well between tenants.
This size suits you if...
You share the bed every night and want more personal space than a UK double offers, you or your partner keep different hours and want less disturbance when one of you gets up, or you're furnishing a rental or guest room that already has a king frame and needs a durable, easy-clean mattress rather than a plush one.
Consider another size if...
Your bedroom is smaller than the 2.7m x 2.9m we suggest for a UK king, or you sleep alone. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m of floor space.
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How big is the HydroShield Classic in a UK king?
The UK king measures 150 x 200cm, which is 5ft x 6ft 6in. That's 15cm wider and 10cm longer than the UK double version of the same mattress. The depth stays the same across every size at 10cm, so it's the footprint you're paying more for, and it's a slim profile on a king frame.
Is the UK king HydroShield Classic good for couples?
It gives two people 75cm of width each, and the Ecofoam's natural rebound means the surface recovers when one of you shifts or gets up early, so movement carries across the bed less than you might expect from a single foam layer. The medium to firm feel suits most couples, although lightweight side sleepers may find it a little unyielding.
What room size do I need for a king HydroShield Classic?
We suggest at least 2.7m x 2.9m for a UK king, with more feeling comfortable once wardrobes and bedside tables go in. New build master bedrooms can be tighter than they look on a floor plan, so measure the actual clear space before committing. If the room falls short, the UK double needs at least 2.6m x 2.8m.
Is the king size long enough for someone over six foot?
At 200cm, the UK king is 10cm longer than the UK double, and for a taller sleeper that extra length is often the real reason to size up. It stops feet hanging over the end or pressing against a footboard. If length is your main issue, the UK king solves it without demanding a bigger room than most doubles-plus-a-bit can offer.
Should I choose the UK double or UK king for this mattress?
For couples, the UK king gives you 7.5cm more width each than the UK double, plus 10cm of extra length, and on a budget mattress like this the jump in size is often the best comfort upgrade available. Go for the UK double only if your room is under 2.7m x 2.9m or the bed is for one person.