The Solid Firm mattress from the Pocket Spring Series stands out for its high firmness and resistance. Made up of two sides, one for summer with Cooler cold fabric and the other for winter with 50kg viscoelastic. In turn, it has a HR 40kg hard shell and a reinforced casing with a perimeter box in HR 40kg extra hard. The perfect option for those looking for a high degree of firmness without sacrificing comfort.