Travel Bags are the most essential thing one has to buy. This has to be done after proper planning as it is an expensive item and has to be retained for years (now that you will be doing lot of traveling in flight).
So get a branded one. They are reliable and you can be sure that they adhere to the size restrictions.
Types of bags you will need :
- Check in Bag (2-3) [2 is allowed normally, in some cases 3 may be allowed]
- Carry Bag (1)
- Backpack (1)
- Accesories :
- Locks (3-4) [better to get number locks]
- Passport Holder (1)