Recently bought a new mattress which is great but needed something on top to help with my back (Arthritis,AS). So I purchased this and I am very pleased with it. It just adds that little extra comfort when you sleep and fluffs up lovely with a big shake. I left it on top of the mattess before putting bedding on, so it could fluff some more. I am happy with this purchase and I am now going to buy it for my children as they keep getting into my bed now