With its two differentiated chambers, the Ecrin Impérial mattress topper offers a plush welcome and firm support. A great addition to your bedding, to be placed on top of your existing mattress. To improve your sleep quality, a mattress topper provides exceptional extra comfort by gently supporting the body. Its support chamber contains a firm filling of 10% down and 90% feathers with a fill weight of 1,500g/m². The feathers provide the spring needed to prevent the mattress topper from losing its shape and to help improve your sleeping position. The upper chamber, which cradles your body, is ultra-plush, with a filling composed mainly of down, at a fill weight of 150g/m². It is this layer of down that gives you a wonderful sensation of softness for restorative nights of sleep. The quality of the finishes and the attention to detail make it an indispensable bedding accessory. Filling in natural down and feathers from white French duck Greenfirst® anti-mite treatment: whose active substance is geraniol and containing peppermint essential oil. Thickness: 8cm Top layer: 90% down, 10% feathers, 150g/m²; support layer: 10% down, 90% feathers, 1,500g/m² Made in France 91-thread/cm² percale fabric, 100% white combed cotton Cassette quilting, 2 chambers with baffles Elasticated retaining straps Cotton bag packaging with handles