Posture Flex Siam Pocket 1200 (Encapsulated) Mattress

291  (4.8 Rated Excellent)

Regular price Now: £399.99 Sale price £399.99
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Size Small Single
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Siam has 1200 Pocket springs in a king size mattress which are all individually held under the correct tension for responsive support. Its a non turn mattress thus not requiring the effort to lift and change. It also has a good grade and quality of Memory foam. Siam is a medium comfort mattress which will cater for most people.  Finally it boasts of a luxuriously soft knitted cover made of Tencel which has an amazing ability to absorb body moisture and is Hypoallergenic, Antibacterial and Biodegradable. Air vents have been integrated within the thick border to rotate and efficiently circulate fresh air.



  • Type of Mattress: 1500 Pocket Sprung Encapsulated, Tape edged for extra side supports.
  • Mattress Depth: 25cm (5cm Soft Memory foam / 2.5cm Soft Foam)
  • Mattress Support: Medium
  • Mattress Fabric: Deep  Quilted Hypo Allergenic Tencel sleeping surface fabric
  • Non Turn – must regularly rotate
  • Flag stitch handles – Easy to carry and move
  • Guarantee: 1 year

All of our mattresses comply to UK Fire Flammability standards.

Mattress fabric shown in the photo can change due to availability and trend shifts in the market place.

Small Single (2ft6″/76cm x 75″/190cm)
Single (3ft/90cm x 75″/190cm)
Small Double (4ft/120cm x 75″/190cm)
Double (4ft6″/135cm x 75″/190cm)
Kingsize (5ft/150cm x 78″/200cm)
Super King (6ft/180cm x 78″/200cm)

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Mattress Jargon Simplified...

Breathable Construction: Promotes airflow to maintain a cool sleeping environment.
Hypoallergenic Properties: Ideal for those with allergies or sensitivities.
Encapsulated Edge to edge Support: Reinforced edges prevent sagging and enhance stability.
Hybrid: Combo of different materials, like coils and foam.
Latex: Natural or synthetic rubber for bounce and durability.
Memory Foam: Contouring material that remembers your shape.
Firmness: How soft or firm the mattress feels.
Innerspring: Traditional coil-based mattress.
Quilting: Stitched patterns on the mattress cover for aesthetics and comfort.
Exemplary hand-crafted quality, made exclusively for Mattress Stop

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