The footjoy freestyle boa edition replaces the normal lace system footjoy first introduced boa in 2006 and has been a hit every since how does the boa system work you may be asking boa works by having spindle at the back of the shoe its linked to a mechanical reel that engages steel laces and nylon guides to evenly pulls the instep closing the shoe collar which draws the foot down and back into the heel of the shoe for complete comfort and security with boa technology you have a lifetime g