Crash pads are pads a skater sticks in their pants to cusion their falls.
Pads can give a skater more confidence to attempt difficult jumps because the falls won't be as hard. It's not as good as the jump harness, which should completely eliminate getting creamed, although it is better than nothing. I know of a couple companies that make crash pads and pants. Garde' is one you can get at Rainbow. Inside Edge advertises another brand.