As a follow up,
1) slower meter is represented by "FEEL" category.
2) clubs, not just balls, affect the meter speed, so Master tier irons plus GI2 ball will be a slower fast meter. Pro Rapture irons plus Gi2 ball equals slow slow meter
3) GI stands for Game Improving. Many people like the GI-SD since it gives you both spin, distance and slower meter, compared to Tour SD ball, which many people also like, which is spin and distance, but faster meter speed.
4) The balls are gone once declared a "Lost Ball", and they are gone once the wear meter dissapears, they are out of your bag. If you go through all 3 of the sleeve you bought mid round, they will be replaced by the standard free ball. Its your job to know how many you have in your bag at the beginning round, cant tell you how many posts on this forum from people whose rounds were "ruined" by running out of advanced balls.