Made-in-Japan, DYNAWIRE synthetic gut string is crisp-feeling with high durability and is available in five vibrant colors. This premium solid core string is made with a high polymer nylon, giving it a crisp response. The core is surrounded by a thin metal film for added power, and the coating has a silicone treatment in order to help the strings snap back on contact. With its great all-around playability and high comfort level, this is a very solid option for non string breakers.