Best Use: Travel
The 3000 cubic inch bag fits more bulky gear while still functioning as a large carry-on bag for your flight. The 5500 fits an unloaded or partially loaded pack plus lots of gear, it's a great all around gear storage and transport size. The 9000 cubic inch bag is designed to fit a fully loaded large KUIU pack, plus boots and other bulky items.
Normally you're already well organized when traveling for a mountain hunt, so you don't need overweight and overbuilt luggage. The minimalist, lightweight design of the TAKU bags gives the added external protection needed to ensure that your gear arrives clean, dry, and undamaged.
