Baby blankets need to be soft and cuddly, and washable. Bamboo is lightweight, drapes beautifully and comes in a wide variety of colors. Perle cotton blankets are a little more substantial and are always gentle on sensitive baby skin. Wool blankets are classic. They can be woven in fine, luxurious fibers such as cashmere and merino, or study handspun wool. I often use Swedish wools, which wear well, are soft and warm, and come in range of gorgeous colors.