This super bulky yarn from Malabrigo is a single strand of 100% merino. It is hand washable in cold water. Each skein is approximately 89 yards, it is recommended to use US 13 to 19 needles (9 to 15mm). Be sure to get enough yarn to complete your project since each bag is a different dye lot, and skeins may vary from bag to bag. Skeins may vary one from the other even within the same bag. To ensure random color distribution, work from two balls of yarn at once, alternating a few rows from each ball.