This is the new Sydney Thunder First Nations Round Jersey 2022/23, a special edition indigenous kit to be worn by the Thunder in the Big Bash League in select games during January 2023. The new Thunder BBL 2023 indigenous jersey has been designed by Rheanna Lotter (Yuin) and is a tribute to Aboriginal and Strait Island culture.
The green shirt has been made by Nike and also carries the Homestar and Home World logos on the front, as can be seen below.