This is the pillow filled with the fleece of the Peruvian Alpaca, which yields lanolin-free, hypoallergenic fibers that naturally resist dust mites. Unlike synthetic or down fibers, Alpaca fibers’ medullated, partially hollow cores and microscopic pores spread and wick away moisture quickly, creating a dry environment unfavorable for the growth and breeding of dust mites. The Alpaca fill in this pillow is free from chemical, dye, or bleach processing, and fleeces are sheared from animals raised in a stress-free, natural setting. Supportive yet buoyant, this pillow’s heavier, fuller body eschews the airiness of feathers, holding its loft and shape for years while conforming to one’s sleep habits. The pillow is protected with a 380-thread count cover made from viscose organic bamboo, a naturally antibacterial fabric that resists odors while providing a hand softer than cotton. Medium Fill. The most popular style. For those who sleep on their sides.