The HOVR Havoc features UA's signature HOVR cushioning technology, which helps absorb impact and provides responsive energy return. The shoe's midfoot TPU shank provides added stability, and the outsole's herringbone traction pattern ensures maximum grip on the court.

However, Mills' footwear choices go beyond just performance features. As an Australian player of Torres Strait Islander descent, Mills often uses his shoes as a way to celebrate and honor his Aboriginal heritage. For example, in 2021, Mills wore custom-designed Under Armour shoes that featured traditional Aboriginal art and symbols during the Tokyo Olympics. The shoes were designed by Torres Strait Islander artist Laurie Nona and included the image of a crocodile, which is significant in Aboriginal culture as a symbol of strength and resilience.

In addition to wearing custom shoes, Mills has also used his platform as an athlete to advocate for Indigenous rights and representation in Australia. He is a co-founder of the Indigenous Basketball Australia program, which aims to provide opportunities for young Aboriginal and Torres Strait Islander players. Mills has also been outspoken about issues facing Indigenous communities, including the ongoing crisis of deaths in custody, and has called for greater recognition and support of Indigenous cultures and traditions.