A mattress 140x190cm will have to be covered with a 140x190cm mattress topper: first of all, remember that the dimensions of your mattress and your mattress topper must be identical. Before any order, take the measures and avoid unpleasant surprises! The synthetic mattress toppers are provided with elastic to attach the mattress topper to the mattress, while the down mattress toppers do not need any grip (their greater weight allows them to stand alone). Your fitted sheets should also be suitable for covering the thickness of the mattress topper and the mattress: take into account the thickness of 6cm of the down mattresses. The 140x190 cm mattress topper provides additional comfort to a firm or mid-firm mattress. Of a softness unequaled, it is the perfect complement of a mattress of good maintenance. Dumas Paris products are favorites of luxury hotels: people who had the chance to test them remember a sweetness like no other! The mattress topper must be used on a mattress in good condition. Remember that the natural comfort mattress topper can not be washed. It should be protected with the protective cover sold separately. To maintain good hygiene, protect your mattress and mattress topper with your usual protection. If your mattress has specific dimensions, we are able to realize a synthetic comfort overlay mattress or a Prestige prestige synthetic mattress overlay to the dimensions of your choice, within 10 days. These products can not be returned or exchanged.