DH Trousers/"pants' or Shorts?

l00cas

I just ordered some no fear shin and knee guards-with the intention of wearing them with some shorts but will they fit under or over some azonic catalyst DH trousers? I dont really want my shins broken in to shards but i'm not sure if the trousers' "padding" is supposed to replace the knee/shin guards or not. So should I get them for winter days and just wear the pads over the top or will this restrict movement too much?

cheers