HiKoo CoBaSi yarn is the wool-free sock yarn you have been looking for. This fingering weight yarn is made from a blend of cotton, bamboo, and silk, with a generous helping elastic nylon. Not only is CoBaSi yarn a perfect choice for all your wool adverse friends, it is also ideal for creating warm winter socks. The sizing of each hank makes CoBasi yarn a great choice for color work! The robust blend of fibers and the ability to be machine washed means easy care, so knit or crochet for all ages without worry!