Hollowfibre Filled Summer / Winter Warm Quilt / Duvet Standard UK Duvet Sizes: Size (Width x Drop): Single: (135 x 200 cm) Double: (200 x 200 cm ) King: (230 x 220 cm) Super King: (260 x 220) ★Colour: White ★ What is Tog? Duvets work by trapping warm air, and the higher the tog rating, the more warmth the duvet will provide. ★ What is Poly Cotton? A fabric made from a blend of cotton and artificial fibres. Polyester is combined with natural cotton to produce a versatile durable fabric. Poly cotton retains its shape and color and can easily be cleaned. The blend of polyester and cotton gives breath ability and has a soft feel. The softness and finish of cotton and the easy care qualities of polyester mean that Poly cotton is a popular choice for regular home use UK Tog Rating Summer Season: 4.5 Tog Spring Season: 10.5 Tog Autumn Season: 13.