That is the "Super Rebellious Jacket", which is a reward for completing the collection "Genetically Popped Collar". The collection is part of the "Sixth Dimension Kryptonian" Time Capsule.
Hair: Atlantean Emperor Face: Enhanced Green Knight Accessory: Green Power Battery Shoulders: Enhanced Champion of Khandaq Belt: Enhanced Champion of Khandaq Feet: Enhanced Champion of Khandaq Legs: Ice Chest: Torchbearer Slimline Aura: Cosmic Green Aura Emblem: Enhanced Green Lantern Alan Scott Enjoy! 👍
You can buy it off the Doctor Fate's Daily Reward vendor in the House of Legends. It was the 2023 April 21st day reward. My video on it: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-bfd_niR3r-c.html
That is the "Reverse Slimline" chest and the "Enhanced Green Lantern Corps" emblem. The chest is an easy to get old Slimline style, and the emblem is only available from the Booster Gold vendor.