Warmth: Light Warmth (4.5 Tog equivalent ). Filling: 70% Hungarian Goose Down / 30% Goose Feather. Your Duvet (US Twin) 70 x 92" 178 x 234 cm. Encased in329-thread-count cotton percale, this luxury comforter features aninternal box construction designed to keep warmth evenly distributed, helping prevent cooler patches and keeping the filling perfectly in place night after night.