Alpaca is softer than silk and rarer than cashmere. Because the fibers are hollow, alpaca is lighter and warmer than wool. It's also one of the most eco-friendly natural materials since alpacas need less food and water than other fiber-producing animals. Alpaca fiber is also naturally hypoallergenic, mold resistant, nearly waterproof, and naturally flame retardant. And we use a lot of it in our Alpaca Topper and Alpaca Duvet Insert. If you notice light shedding of alpaca material — fibers coming through the cover — don't worry; it's perfectly normal for some of the fibers to poke through.