Rated some of the safest, most comfortable stirrups by The Horse Journal u and by many of our customers. These stirrups allow movement in four directions a the same time. This is the only stirrup in the world which has dual flexibility thereby softening the impact on ligaments and cartilage. Staff members and customers with knee and joint problems swear by these stirrups. Also, in the event of a fall, this the stirrup is much less likely to trap your foot, which is one of the reasons it was named 2003 Product of The Year by The Horse Journal. Note: Because of rubber covering, stirrups are actually 1/4" smaller than size listed.