Tap and open your club's activity list.
NOTE: Make sure you are signed in with the correct profile to purchase the hoodie.

Tap on the available hoodie class.

NOTE: Higher XP = Higher Discounts (if made available by your club)

Tap on "BUY FULL PACKAGE" to book and pay for your hoodie.

In the menu you have two paths to the chat.
 
Through your Schedule:
Tap on Schedule then find the hoodie class. After you tap on the hoodie class, you will be able to join the chat.
 
Chat Menu Item:
Tap on Chat to show all active and archived chats. Tap on the hoodie chat.

Tap on the link in the chat to go to the form to make your hoodie selection. Once you've submitted the hoodie form, your order is complete.