VS Touch available in 16, 1.30mm or 15L, 1.35mm weatherproof. VS Team natural gut 17, 1.25mm best string for performance and comfort, used by Roger Federer to great effect. VS Touch natural gut or VS Team natural gut should not be used in wet weather conditions as rain or moisture will damage the strings. Can be used for Tennis or Squash stringing. Made in France since 1875.