Ah, then that is no good. I wear very heavy armour, but it is part of my training. I have good agility since I wear this armour daily, it is pretty heavy, the complete set. The upper body is around 22lbs, legs around 16lbs. Total weight is around 50lbs, includes lower layer and most gear for me, yours may be a 40lbs, since you carry lighter gear it seems. I have an exo to aid my movement as well, that is a key factor. But you want 20lbs combined total armour weight, and so I have another solution: maybe some thin carbon fibre armour? It will cost you more, and doesn't last as long, but provides decent protection.