First you need to get the Thieves Guild quest "Boots of Springheel Jack" and complete the majority of the quest, retrieving the Boots. Do not, however, return the boots to the Grey Fox.
Upon obtaining the Boots, equip them to get a +50 Acrobatics bonus, then travel to the Shrine of Sanguine and begin the Daedric Quest there. Follow through that quest, and allow yourself to be arrested by Leyawiin guards when they try. All your possesions will be taken, except for key items (which include the Boots).
Stay your time in jail, and upon exiting, check your inventory. You should still possess the boots, but when you try to equip them the game will tell you "You cannot equip this item at this time". However, if you check your current enhancements, the +50 to Acrobatics will still be there! You can now wear other footwear, but still have the bonus from the Boots of Springheel Jack!