Description from the publisher:
The Genesys Roleplaying Dice Pack features three Ability dice, three Difficulty dice, two Setback dice, two Boost dice, two Proficiency dice, and two Challenge dice. These dice, combined with the Genesys Core Rulebook, give you everything you need to run a game with infinite possibilities.
These specialized dice provide dynamic results to every skill check, allowing players to succeed in their task while experiencing a massive setback, or finding some advantage in a critical failure. Not only that, but the dice are easy to interpret, keeping the flow of the game steady and smooth as players and game masters apply the results of the myriad of skill checks.