One duvet, four seasons. The Emma All Seasons Customisable Duvet gives you two separate layers that clip together or apart in seconds, so you always sleep at exactly the right temperature. Use the 3.5 tog layer in spring and summer, switch to the 7.0 tog layer in autumn, or clip both together for a 10.5 tog combination through the coldest winter nights. The clip-on connection keeps both layers locked in place through the night, so there's no slipping, no bunching, and no waking up tangled. The 100% cotton cover is breathable and sourced sustainably. The fill is made from recycled polyester, so you get long-lasting warmth with a lighter footprint. Both layers and the combined duvet are fully machine washable, making care as simple as the duvet itself. Available in Double, King, and Super King.