The Mayfair 5000 14"" ultra-premium dual-sided mattress from Primo International features 5000 individually hand-nested pocket springs engineered with 11 ergonomic zones for optimal comfort and support, temperature-regulating fine Lancashire spun cotton, British wool and silk, and eight suitcase-stitched handles with 16 air vents for air circulation. Handcrafted by skilled artisans in the United Kingdom with only finest fillings.