The New Balance FuelCore Sonic uses the BOA Fit System, which consists of an integrated rotating dial, laces and lace guide, that lets wearers easily adjust the fit of the upper by turning the dial to their liking.
Caption: 
The New Balance FuelCore Sonic uses the BOA Fit System, which consists of an integrated rotating dial, laces and lace guide, that lets wearers easily adjust the fit of the upper by turning the dial to their liking.
Credits: 
PHOTO: NEW BALANCE