Presenting REXIS FEEL! Yonex has produced one of the most sophisticated multifilaments available with this string. Rubber Polymer Capsules, which are placed within the filaments to increase flexibility and pocketing, are another advantage of REXIS Feel in addition to its army of flexible filaments that protect your arm. Additionally, this string benefits from a high modulus polyurethane, which helps avoid frictional wear (think durability) and improves the strings' ability to snap back during impact (think spin). In the end, Yonex has produced a truly remarkable multifilament with its great comfort, controlled power, and above-average durability.