Cosy Nights 4.5 Tog Anti-Allergy King Size Duvet - Breathable Premium Microfibre Cover with Lightweight Hypoallergenic Hollowfibre Filling Bedding Quilt - (230Cmx220Cm, White). Colour 4.5 Tog. This duvet insert filled with hypoallergenic hollow fibre and has overlocked stitched edges.