packsacks

Packsacks are bags designed to be carried on the back, typically with shoulder straps.

The term is essentially synonymous with backpack or rucksack, though it tends to appear in older texts or in contexts emphasizing rugged outdoor use.

He loaded his packsacks with provisions for the week-long trek.

The word combines pack, suggesting bundled goods for transport, with sack, emphasizing the bag's simple, utilitarian construction.