From couch feeling my mattress had only liked, after 3-4 years it was unfortunately wg. no longer usable the resulting deck Kuhlen. Dunlopillo fortunately was so accommodating and they had "5-year guarantee" against a new replacement as this was then after 3-4 years back so strong sun Kuhlen that I could not sleep on it. Dunlopillo should improve Coltex material, 3-4 years durability are too low.