The double boa is incredible. The technology with boot design these days is amazing. I like to keep them loose in the toes on the lift and just with a few twists of the button..boom they are tight again. I can even stop in the middle of a run and adjust them so easily. Who wants to have to stop and re-lace and re-tighten, or wear your boots at the same tightness all day. I'm spoiled with these!