Multifilament strings are among the most comfortable tennis strings available to players. They were originally created to allow players to experience the comfort of natural gut strings at an affordable price. They are also more durable than natural gut strings, through less durable than polyester strings. Some of the most popular examples of Multifilament strings are the Babolat Xcel and Tecnifibre X-One Biphase. As they are better on the arm compared to other strings, they are a great choice for anyone suffering from tennis elbow or any kind of arm problems.