Silicone tubing is far superior to regular airline tubing. It's the same stuff most people for CO2 injection. When regular tubing is used for CO2, it will leak and eventually turns into a rather unpleasant mush.
Silicone does not degrade or "stiffen up" as fast as regular tubing does.
You can also buy ozone resistant tubing as well, which is superior to silicone, and far more expensive. However I have never used that for pumping air, so I cannot comment on how well it works just for that. I use it for CO2 injection.
Roan