The Harrison Spinks Diamond 25000 Mattress is a luxury Seasonal Turn mattress, handmade in Yorkshire to deliver exceptional comfort, refined support and a truly indulgent sleep surface. Designed for customers who want premium natural materials paired with advanced spring innovation, this mattress brings together an impressive spring count with beautifully layered fillings for a sleep experience that feels supportive, breathable and wonderfully luxurious. With its standout specification and high-end finishing, the Diamond 25000 sits at the top end of the Harrison Spinks range for those investing in long-lasting quality.

At the core of the Diamond 25000 Mattress is an advanced spring system featuring 25000 springs in a king size. The mattress includes the Cortec™ Quad spring system, designed to provide responsive, body-contouring support that adapts as you move through the night. This is enhanced by multiple layers of high-density micro springs, including HD 4000, HD 2500 and HD 2000 micro springs. Positioned closer to the sleeping surface, these micro spring layers refine the feel of the mattress by increasing contouring, improving pressure relief and supporting a more stable, well-aligned posture. The overall effect is a mattress that feels both luxurious and highly supportive, with a level of responsiveness that suits sleepers who want comfort without losing structure.

Comfort is elevated further by an exceptionally rich blend of natural fillings, carefully layered to create a breathable, supportive and temperature-regulating sleep environment. The Diamond 25000 includes blended British wool and viscose, plus a British wool and mohair blend for added resilience and natural warmth. For an even more luxurious feel, the mattress also includes a cashmere, Yorkshire wool, silk and British wool blend, introducing a softer, more indulgent surface comfort while maintaining support. These are complemented by a British wool, hemp and flax blend and a cotton, hemp and flax blend. Hemp and flax add absorbency to help draw moisture away from the sleeping surface, while cotton supports a fresher, cooler feel. Wool contributes natural temperature regulation, helping the mattress remain comfortable across changing seasons. The inclusion of traceable British wool also supports customers who value ethically sourced materials.

As a Seasonal Turn mattress, the Diamond 25000 is designed with a warming wool winter side and a cooling cotton summer side. This seasonal construction allows the mattress to be rotated and flipped, helping encourage even wear and maintain comfort over time while offering a sleep surface that better suits the season.

Finishing details reflect the premium craftsmanship. The mattress is completed with an in-house woven FR chemical treatment-free cover and finished with four rows of diamond side stitching. This strengthens the borders, improves edge support and helps the mattress keep its shape and structure for lasting performance. With a depth of approximately 28 cm, the Diamond 25000 offers a plush, substantial profile that still provides a supportive, well-balanced feel. Available in gentle, medium or firm tensions, it can be tailored to personal comfort preferences. For added peace of mind, it comes with a five year manufacturer’s guarantee followed by a five year warranty, giving ten years of total cover.

Key Features of the Harrison Spinks Diamond 25000 Mattress

• Seasonal turn mattress with a warming wool winter side and a cooling cotton summer side, designed to be rotated and flipped to encourage even wear and long-lasting comfort.
• 25000 springs in a king size mattress, delivering exceptional responsiveness, tailored support and a refined sleeping experience.
• Cortec™ Quad spring system, designed to provide body-contouring support and consistent stability as you move through the night.
• Multiple layers of HD 4000, HD 2500 and HD 2000 micro springs, adding enhanced contouring, pressure relief and support closer to the sleeping surface.
• Natural fillings including blended British wool and viscose, British wool and mohair, and a cashmere, Yorkshire wool, silk and British wool blend for a luxuriously soft yet supportive feel.
• British wool, hemp and flax blend and cotton, hemp and flax blend layers, incorporating absorbent fibres to help draw moisture away and support a cooler, drier sleeping environment.
• Traceable British wool, offering reassurance for customers who value ethically sourced and sustainable natural materials.
• In-house woven FR chemical treatment-free mattress cover, designed for a more natural and reassuring sleeping surface.
• Four rows of diamond side stitching, reinforcing the borders to improve edge support, durability and structure retention.
• Approximately 28 cm mattress depth, creating a plush and supportive mattress profile.
• Choice of gentle, medium or firm tensions, allowing the comfort level to be tailored to the sleeper.
• Five year guarantee followed by a five year warranty, providing ten years of total cover for added peace of mind.