Being in the mid forties and still being active in tournaments in addition to a full tennis teaching schedule I needed a string that I can compete with but also wouldn’t be too hard on my arm. I tried a few different strings o er the past years but have always come back to the Quadro. It has helped me and my wife Brandi win a few National Titles and a couple of mixed World Championships.

Kodiak High school uses a hybrid of Hexagon-X Pearl Red 16L and ProTour 17L strung at between 48 and 53 depending on the racket…. We Love it.

I’ve won 4 gold balls this year and 1 team national championship using this amazing string. It is soft on the arm and offers immense spin action to my serve and groundstrokes. The feel is perfect

Been using the Protour black 17L for a cross string with Square X Sharp in the mains. Everyone has been loving it on my team. Hoping it will be durable enough to keep this my top spin/arm friendly poly hybrid!!!

I’ve used this string for years and love it. Gives you easy top and back spin and very arm friendly.

If you have not purchased your YTEX shorts yet, this is your sign to go buy some ASAP before they sell out.

These feel amazing. As a tennis player, it's imperative to have the right pair of shorts so you feel loose and free while playing your match. These exceed all of my expectations and I will be wearing these on and off the court.

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High quality, great look, and amazing comfort!!! Will definitely purchase another pair!! Hope to see more color options soon!

I like the spin and power you get with it it also has some control as well, could be a little more durable but other then that it is a great string

Does not match the description including the gauge of 18 which is more like 16! Had to change it back to Quadra twist!

Put this set in my wife's racquet. They have increased her spin rate and are a little more powerful that what she had been playing. Really helping her to get her game to the next level

These strings will not break! I hit with a lot of topspin and my previous strings used to move around quite a bit, causing a lot of friction. I would break strings frequently. I play singles twice a week and haven't broken a string all summer!

Sometimes grip bands break or get lost during regripping and this can be a difficult accessory to find. I was excited to see that YTEX carries them! They are stiff and unbreakable!

My fave co-poly strings, after having used other companies' more famous products (from Volkl, Head, Solinco, Luxilon, Technifibre, Dunlop) - soft and easy on the joints yet responsive with spin and power and control. Try them! Black is a tad softer. Both excellent.
But they bombard you everyday with unsolicited promo emails even after you unsubscribed and asked them to remove you from their mail lists.
Great products from very tacky people.

Love the spin and control as well as the comfort of Quadra Twist! The best for me right now!

Spin is super high off of my left handed kick serve. I'd use these again.