This is the "dagi" (also sometimes pronounced as "chagi/chagee"). In the olden days, it was a very common transport backpack for the Ibaloys of Benguet. These were usually used for transporting agricultural goods like rice, fruits, and vegetables.
It has two shoulder straps. It has a third strap that goes over the forehead of the carrier. This head-strap is very similar to the head-strap in the "kayabang".
The bottom part of the pack has extended poles from the pack's rattan frame. This enables the carrier to sit down with ease and rest while keeping the pack upright.