Fox unveiled its original laced Union Flat shoes last year and followed up with a canvas version and the BOA-equipped model. I was impressed with the originals and gave them 4.5 stars out of 5 in my Fox Union Flat review, rating them as some of the best mountain biking flat shoes you can buy. So could replacing the laces with a BOA fastening system improve the already excellent shoes? I've been testing the Fox Union BOA Flat shoes over the past six months to find out.
