Once the shoes are on , the wearer presses their heel on the concealed disc linked to the laces by wires .
Wearers can use a lever attached to the back of the shoe to release pressure and loosen the lace .
Once the shoes are on , the wearer presses their heel on the concealed disc linked to the laces by wires , and wearers can use a lever attached to the back of the shoe to release pressure and loosen the lace .