An adjustment system for adjusting the width of a cuff has an elongated adjustment strip having a set of longitudinally extending teeth. Each tooth has a forward side and a rearward side. A length of each forward side is greater than a length of each of the rearward sides so that an angle between a longitudinal axis of the strip and the forward side is less than an angle between the longitudinal axis and the rearward side of each tooth. There is a locking mechanism formed by a base plate having a locking device on an underside and a guide for slidably connecting the locking mechanism to the strip. The tooth and the locking device are configured so that the locking device can be moved forward along the strip using only a small amount of force, and can then be moved rearward using a larger amount of force.