To create a more luxurious Duvet Insert, we fill a 100% GOTS organic certified cotton percale case with natural alpaca fiber, available in two weights — all season and lightweight. Sourced from the Peruvian Andes, our alpaca fiber is renowned for its supreme breathability, wicking, and thermoregulating properties. Our Alpaca Duvet Insert pairs perfectly with our Organic Linen Duvet Cover or our Organic Cotton Duvet Cover.