90% Goose Down and 10% Goose Feathers. 100% Organic Cotton Satin Weave w/Hastens Gingham Check Detailing. Size is not marked, but likely Large. I wear an 8.5 and they fit w/ plenty of room for a larger foot. Everything has been washed a number of times and is very clean, but there are still some marks on bottom of each bootie. See pics. Will ship in plastic bag shown.