120-night sleep trial with comfort guarantee
Free shipping on orders over €49
Finance your purchase for up to 40 months interest-free
Enjoy the new Flex Eternity Pocket Mattress and experience premium sleep comfort with one of the most advanced double pocket spring systems developed by Flex. Designed to provide balanced support, excellent adaptability and superior sleeping independence, this mattress delivers a refined and ergonomic sleep experience.
Its main advantage is the innovative double pocket spring core composed of a 5 cm Pocket Premium® Micro spring layer together with an 18 cm Pocket Premium® Pro spring block. This combination multiplies the benefits of pocket springs by adapting independently to every part of the body while improving spinal alignment and reducing pressure points.
The comfort layers combine hypoallergenic and thermal fibres with Double Soft Sense foam and the Comfort System® technology, creating a progressive and weightless comfort sensation while helping muscles relax during sleep.
The outer fabric contains a high percentage of viscose, offering an exceptionally soft touch and helping improve adaptability between the body and the comfort layers of the mattress.
The breathable materials used throughout the mattress promote continuous airflow and moisture evacuation, helping create a fresher and more comfortable sleep environment all year round.
With the quality guarantee of Flex and the service of Colchón Exprés, the Flex Eternity Pocket Mattress also includes free delivery, installation and old mattress removal in mainland Spain.

Do you need help? Book a free call, at a time and day that suits you, with one of our experts, from one of our physical stores. We will listen to your needs and tell you which mattresses or pillows best adapt to your way of sleeping, without any commitment.

Hypoallergenic Fibers
High quality compact fiber, designed to reduce the risk of allergies and maintain a constant temperature. It offers a progressive reception, excellent comfort and promotes continuous ventilation that improves the recovery of the mattress.
Double Soft Sense System (DSS)
Soft high-density foam integrated into the padding, which improves the reception in the initial lie down and provides an enveloping and comfortable rest from the first contact.
Commodo+® System
High-density material that progressively adapts to the body, avoiding pressure points and improving the ergonomics of rest.
Pocket Premium® Mipro pocket spring (5cm)
Pocket Premium® Mipro pocket spring upper shell, which complements the main structure, significantly improving reception and comfort. Its design reinforces point-by-point adaptability, maximizing the properties of the core and offering a more enveloping and precise resting experience.
Pocket Premium® Pro pocket spring (17cm)
Main shell of Pocket Premium® Pro pocket springs, with individually pocketed springs that provide progressively superior firmness and bed independence. Its design allows a perfect adaptation to the body, providing personalized support and a more stable and long-lasting rest.
| Flex Eternity Pocket Mattress | Termalfresh Swiss Ingravity Mattress | Flex Ever Strong Mattress | |
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| Marca | |||
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| Firmeza | |||
| Firmeza | 8 / 10 | 9 / 10 | 10 / 10 |
| Precio | |||
| Precio | €73800 | €74900 | €59220 |
| Galardon | |||
| Galardon | - | Best Memory Foam Mattress for Hot People | - |
| Tejido Exterior | |||
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| Capas del Acolchado | |||
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| Encapsulado perimetral | |||
| Encapsulado perimetral | Si | No | Si |
| ¿Es desenfundable? | |||
| ¿Es desenfundable? | ![]() | ![]() | ![]() |
| Tratamientos termorreguladores | |||
| Tratamientos termorreguladores | Tejido Damasco |
| Tratamiento Optigrade del Tejido Exterior |
| Transpirabilidad | |||
| Transpirabilidad | 9 / 10 | 10 / 10 | 9 / 10 |
| ¿Es idóneo para camas articuladas? | |||
| ¿Es idóneo para camas articuladas? | ![]() | ![]() | ![]() |
| ¿Es simétrico? | |||
| ¿Es simétrico? | No, Colchón a 1 sola cara | No | Si |
| IMC's Recomendados | |||
| IMC's Recomendados |
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| Soporte más recomendado para este colchón | |||
| Soporte más recomendado para este colchón |
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| ¿Admite la opción de colchones gemelos? | |||
| ¿Admite la opción de colchones gemelos? | ![]() | ![]() | ![]() |
| Período de garantía | |||
| Período de garantía | 3 años | 10 años | 3 años |
| Altura | |||
| Altura | 32 cm | 27 cm | 32 cm |
| ¿Cupón promocional especial activo? | |||
| ¿Cupón promocional especial activo? | ![]() | | |
Express Shipping in 48/72 hours
The Express Shipping Service in 48/72 hours, for this mattress, is available throughout the Peninsula and the Balearic Islands.
The Mattress will be sent vacuum packed.
* This Service is incompatible with the Old Mattress Removal Service.
120 Night Trial
At Colchón Exprés we want you to try your mattress comfortably at home. That's why we offer a 120-night trial on our best-selling mattresses.
If you're not convinced, you can exchange it for another one of the same size that you like better, before the trial period ends.
Check the 120-night trial terms and conditions to find out all the details of the promotion.
Interest-Free Financing
Pay in up to 40 months Interest-Free. You can finance any order from €90, as long as the minimum monthly payment is at least €12.
Super convenient. We'll call you and one of our advisors will guide you through the financing process over the phone.
No strings attached. You can make early payments whenever you want, with no penalties or hidden tricks.
Your data protected. We don't sell your data to third parties.
For more information you can click here.
DOUBLE Sonpura Promotion
If you buy a Sonpura mattress together with a Sonpura Base, Fixed Canapé or Folding Canapé, of the same size, you will have:
45% Discount on the Base or Canapé, instead of the usual 30% (this discount will be applied directly in your cart).
5 year warranty on your equipment. rest.
*Promotion not applicable to Sonpura mattresses from the Micro range (Gaudí, Royal, Carisma and Titán) nor to the Spirit and Silence models from the Multiadapt range.