The phrase "cozy duvet" refers to a warm and comfortable blanket that is usually filled with feathers or down. It is used to keep someone warm and provide a sense of comfort and coziness while sleeping. Full definition
With contemporary styles that were designed to please, guests of the hotel are treated to superior guestrooms featuring rich jewel - tone colors, dramatic city views, cozy duvet covers and the Sheraton Sweet Sleeper (SM); a world - class fitness center and an upscale restaurant and bar. (southwestvacations.com)
The private bedroom has a king bed with quality linen & cotton bedding with your choice of natural woollen blankets or a warm cozy duvet. (alluxia.com)
Both down and down alternative are available as cozy duvet inserts. (potterybarnkids.com)