Edit - stack with 15% cashback (Cap $25) @ ShopBack.
I was just randomly changing the word "outlet" in "https://www.adidas.com.au/outlet" to Boxing Day, Cashrewards etc and came across this deal.
For a limited time, get 40% off select Ultraboost 20. Add to cart and apply code SHOPBOOST at checkout. Valid 12am - 11:59pm AEDT on 6th December, 2020. *Excludes Ultraboost 20 DNA and Space Race models. Eligible styles listed below.