I think she uses bungee xl yarn. 6×4 meters, 4×1 meters, 24×3.2 meters for the backpack. 2×2 meters, 2×6 meters white and 2×6 meters grey for the "strings" she makes at the end.
Love this! Would love to know what kind of cord you used and where to get it? What mm cord is this? Maybe I could find something similar to it. Thank you :)