Luxury blend of polyester and pure natural silk for a supersoft filling. 100% polyester cover finished with beautiful dove grey piping and a contemporary seersucker detail. The 10.5 tog is suitable for all year round use. The all-season duvet contains both a 4.5 and 9 tog duvets which fasten together to make an overall 13.5 tog duvet. Simply adapt the tog to suit the season by clipping together or using the duvets separately.