Gear Bags give you rewards such as Coins, Diamonds, and Cards. To receive Gear Bags you need to win matches.

To open these Gear Bags, tap on the Gear Bag at the bottom of the Home screen and tap start unlock. Depending on the type of Gear Bag it will take you a certain amount of hours to open: Starter Bag, All-Star Bag, MVP Bag, and Grand Bag. If you do not want to wait, you can open the Chests by paying Diamonds. You get 2 free Gear Bags per day.

Additionally, Grand Bag, MVP Bag, and King Bag can be purchased from the in-game Store using Diamonds.