IR does not get suppressed, or well it didn't last time I checked.
It's 60 second duration with a 60 second recharge, meaning permable out of the box. A good overlapping with a single recharge, so you can prevent recasting it mid-jump.
Super Jump; while you can still jump a decent distance with it while suppressed, it won't have the Super Jump speed bonus, meaning people won't have a problem keeping up speedwise.