180 thread count. 100% cotton down-proof cover features cotton piping. Fill consists of 95% feather, 5% down. Feather fill provides additional support and resilience. All down is sourced from an RDS Certified supplier—Responsible Down Standard ensures that down and feathers come from ducks and geese that have been ethically raised. RDS standards ensure that animals live healthy lives and do not suffer pain, fear, or distress.