Ultimatum N°1 Mattress TopperThe Ultimatum Mattress topper N1 offers enhanced softness, adaptability, and flexibility, contributing to an ideal sleeping environment. This mattress topper is the thickest and most bespoke of its kind, with a nine cm height, featuring a blend of white horsehair and pure cashmere. This topper stands out for its high proportion of materials, with more than 60% horsehair and 30% cashmere. A higher percentage of horsehair improves moisture control,