The Herm Sprenger Bow Balance Stirrups are bow formed for a perfect fit.  This enhances security, pivoting into 4 directions simultaneously.  They provide shock-absorbtion and are gentler on the ligaments and joints than traditional stirrups.  Featuring an extra wide foot pad with a reduced risk of the foot becoming trapped within the stirrup.  Two types of rubber on the tread provide a better grip.  Please note: this is not considered a safety stirrup.  Available in 4 1/4", 4 3/4", and 5 1/8".