Its a superking one so its massive and has seperate pockets woven into it with temperature regulating material in each pocket, its pocketed so unlike duvets the mass of the filling doesn't move to a single place so its an even spread. She is on the larger size so the weight of the blanket has to suit the person, the majoirty of ones for a double bed are 9Kg, but this was shipped from the US to be heavier.