Wilson Hollowcore 16 is a comfortable tennis string designed for those needing a softer, easier on the arm type of string. Several of my stringing clients use this either as a whole or in a hybrid set-up. If you havent tried than here is your chance for a free set. Just comment on my post at my website www.racketstringingtips.com as too why I should select you to win and your entered. I will than draw a name on August 1st. I hope to hear from you.