As I mentioned before the project is to design a Nike MTB shoe for the London Olympics 2012. Here the concept was a double closure system so as to provide the user with a closure system with which he could alter the foot hug on both surfaces of the upper -the outer and the inner. It employs a simple strap which has a velcro at its terminal ends.
Me personally like the bottom sketch as it is not one of the 'Roshan' views..;)...and also took just 10 minutes for it. Credit goes to the situation when one has to submit a whole design process presentation within 2 hrs with all the concept sketches!...Cheers