The AFLCUA has produced the following quick-reference guide to help remind new (and returning) umpires what they need in terms of unifom and kit/gear. Items in BOLD are the essentials while other items are optional depending uopn your umpiring discipline.
Most of these items can be bought via the official Umpire AFL supplier 'Project Clothing'.
Fieldies (including Junior Umpires):
First Year Umpire tips/deals