Acavallo Arena Alupro Junior StirrupsThe brand new collection of Arena Stirrups for kids is based on several years of extensive research, development and success of our Acavallo Arena stirrups. The patented and laterally opening arm, produced by means of an innovative, injection moulding technique. The outer articulated stirrup arm helps the foot release in case of emergency. The opening of the stress actuated locking and release mechanism is located a centimeter higher from the tread to