Gently Used King/Cal King Duvet Set! 100% organic cotton Long-staple cotton ensures the highest quality and durability 4 interior corner ties on our duvet cover to secure to our duvet insert corner loops You’ll feel the difference immediately: this duvet set is buttery, breathable and gets softer with every wash. It starts with the highest quality threads sourced from the finest long-staple 100% organic cotton on earth. Each thread is then luxuriously woven to ensure this duvet set feels incredible for years to come.