This time of year such as when we are out hiking such as today, my backpack weighed in at 26 lbs. After 6000' total feet of ascents and descents over a relatively short distance, we were covered in sweat on the ascents despite the low temp of 42 F and minimal clothing. At least with the gear in a backpack, the front of the body and arms are exposed to the air which helps a lot with cooling. Wearing a jacket with all that gear along with the leg holsters such as this person has, we probably would of collapsed from heatstroke today...

Even though the above is not the norm for 99% of people, in a bad bug out situation, this is one of our off-road routes out of the area and is why we hike it a couple of times per year for conditioning and route familiarization. That being said, I cannot fathom how practical this person's setup would be in this type of situation. Wearing all that jacket and gear right on the body would get warm after walking at any speed for any distance...regardless of terrain.