Babolat Tonic+ Longevity: Babolat Tonic+ Longevity is the same quality natural gut as Babolat VS, but without the same consistency in gauging (Longevity will be the thicker gauge of the two Tonic strings). Babolat’s exclusive Thermogut Technology Finishing increases durability by 25% and resistance to humidity by 60%. The new BT7 design reduces the number of filaments in the string from 15 to 7, but increases their size for added durability for the modern style of play.
Construction: Natural Gut
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Tennis Express Reviews
I recently purchases babolat tonic gut strings and am extremely pleased with their performance. As a professional racquet stringer, I am also pleased with their ease on installation compared to other natural gut strings.
I love these strings. They offer great feel and are powerful. Love them.
Natural Gut Wonders!!
I have been using this string for the past few years and I love it! I have tried other strings to offset the cost of using gut, but I end up spending more due to breakage or tension loss. I have found the durability to be amazing, it lasts three times longer than any multi filament I have tried before NXT, Bi-phase, NRG, to name a few. Every time I try a different string for my hybrid I kick myself for straying away from this string. I use this in a hybrid with big banger rough in a Wilson Pro Staff BLX 90
Asics racquet strung with gut
Even though I am still getting used to my new Asics racquet, I am pretty happy with the stringing at this point. Might go down a little next time. But I love the gut, have always played with gut. SA Anderson
Babolat 15L natural gut strings
I have two identical Volkl Organix V1 rackets: one strung with Tonic+ natural gut and the other with Wilson synthetic gut both are strung at 55 lbs. There is a noticeable improvement in feel and comfort with the natural gut strings. I only have a few sets on the new gut strings and cannot comment on longevity.
Natural gut which lasts longer
I used to play with synthetic guts, but after trying the natural guts, I like the latter much more better. The con with natural guts is that they do not last long, and they break after a while especially when they get wet. Sometime, the natural gut breaks by themselves if you do not play right after stringing. The new Tonic + Longevity appears last much better. However, I do not think they feel the same as the traditional Tonic Touch.
The racquet overall is perfect. The string tension works out well. No complaints.