This incredibly warm shrug is made with Fat Wool yarn from local Shetland wool (70%) and Fat Wool Co's very own Alpaca (30%). This shrug has such high insulating value it could very well have a measurable R factor! I left the neck more open than my other shrugs and the comforting weight of this shrug will give you the confidence to handle the wind chill! Hand Wash, lay flat and block to desired shape to dry. All Fat Wool Co fiber is sourced from Michigan Family Farms, spun in a local family owned fiber mill, and knit with care in Michigan.