I always see American soldiers in the movie and television in a thick equipment, back on the back of a big bag, that bag are put what things?

Usually including spare ammunition, water bottles, GPS, a smartphone, night vision, communication equipment batteries, medical emergency kit, tourniquet, biological and chemical weapons detector, gas mask, chemical cloak, three-proof gloves, emergency food, water purifier.

This must affect the sensitivity, if it is not too far from the base or armored fighting vehicles, it will not take so much, but if the infantry fighting at a distance, we see from the television in Iraq and Afghanistan, are airborne divisions, mountain divisions and members of the Marines, all belong to the light troops, if it is the armored divisions or mechanized infantry, many of the equipment is in the infantry fighting vehicles, the These heavily armored personnel are not going to get too far away from their combat vehicles.

Casually, have you ever seen a Chinese paratrooper unit that also carries a huge field backpack, and a lot of the equipment is mandatory and can't be reduced.