Seasons: Summer, hot or humid climates 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: 100g/m² Tog: 3.5-4 Structure: Square stitching Class 1 according to European standard EN 12934 Light and summery. 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 with a batiste cotton, soft and fine with silver satin piping. The duvet casing is stitched, the upper and lower sides are sewn to each other without side walls. This method of construction is mainly used for summer duvets.