Stretchy, vibrant, and colorful, self-patterning Bamboo Pop Sock is 100% wool-free. Great for cheerful socks, accessories, baby knits, and more! 450m (492yds) and 100g (3.5oz). 55% Bamboo, 37% Cotton, 8% PBT. Machine wash warm, dry flat. 5 balls/bag. The r