Seasons: All seasons, for well heated or air-conditioned rooms Filling: 90% New White Hungarian Goose Down, 10% New White Hungarian Goose Feather Casing: cotton batiste: soft and fine, 350 threads/inch² Weight of filling: 200g / m² Tog: 9 Structure: Square pockets with side wall Class 1 according to European standard EN 12934 Light with intermediate heat (compared to the Prestige and Prestige Summer). The filling consists of 90% New White Hungarian Goose Down and 10% New White Hungarian Goose Feather, thus achieving a very high Fill Power of FP800, while remaining extremely light. This exceptional quality filling is wrapped in a soft, fine cambric cotton with an outer side wall and silver satin piping. The batiste casing helps to maintain a uniform distribution of the filling and helps to avoid the formation of any cold zones.