This cozy duvet is generously filled with a hollow fiber synthetic which traps and retains heat in its center  to keep the sleeper warm.  The outer covering is made of a fine, high threadcount cotton. Hollow fiber fill traps the sleepers’ heat for excellent insulation. The 100% cotton ticking is both absorbent and breathable for extra comfort. Fill : Hollow synthetic fiber, Hypoallergenic Shell : 280 Threadcount 100% Cotton Construction : Comes with our Tie-down 4 corner loops Machine Washable