There is not much left of the old LJK rucksack except the name, external frame design and a structure that can withstand pretty much anything. The compartments and structure of the entire rucksack have been designed anew from scratch. The end result is more practical than before and considerably more versatile. The modular LJK has also been found to be a functional and reliable carrying device when used by the Finnish Defence Forces and the Finnish Border Guard.
A traditional external frame backpack is at its best with a heavy load but is equally suitable for lighter outings as well. The external pipe frame allows air circulation between the bag itself and the back of the user, reducing the heat load significantly. Although anatomical rucksacks have taken over some turf in the rucksack market, there are still situations where nothing beats an external frame backpack.