What is the thread count for the duvet? Simba - Odyssey June 14, 2018 13:25 Updated Follow Our quality filling is held snug in a 300 thread-count and 100% cotton case. Related articles What kind of packaging does the duvet come in? What is the Simba Duvet made of? Do I need to use a pillowcase and duvet cover and will my current one fit? What's the difference between a Hybrid and a Hybrid with added OUTLAST® and down pillow? What makes the Simba sheet special?