Jailbreaker is a medium armor set. With the 5-piece set bonus, gain Minor Expedition at all times, increasing your Movement Speed by 10%.
The Jailbreaker set is part of the base game. It drops in Banished Cells I and Banished Cells II in Auridon. Each set item is bound on pickup. You can acquire medium armor, weapons and jewelry of this set in the Khajiit motif style.