My experience with pressureless tennis balls has always lead to arm problems. Try them and see if the Comfort name of the ball is real.
For me if I want a long lasting ball for the basket I've had good success with the Wilson US Open. There may be others that are better and more cost effective.
"i thought those were just a little harmless brown bugs, you know the ones take wings and fly? but it turned to be Flees." Fedace