Instruct: Classify an Amazon review into positive or negative sentiment.
Query: WILL NOT TOLERATE SWEAT

I've had two of the S9s. Both have shorted out due to sweating in the gym and while running. Motorola and Amazon BOTH will not support the return or exchange of this item. Do your research and GOOGLE this item in various forums. If you don't sweat its great. Sounds goods, fits good, goes on and off easily...even the phone features work well. But it will NOT tolerate sweat or any moisture (rain).Been using the JayBirds for awhile now and they WILL tolerate sweat, but they don't go on as easily and the earpieces don't fit as well as the S9.Still waiting for the ultimate athletic headphone..... Good Luck