Acavallo Stirrups Arena Alu Plus 2.0 AluminiumEver had that nagging worry about getting your foot stuck in the stirrup? Well, say goodbye to that fear with the brilliant Acavallo Stirrups Arena AluPlus 2. 0. These stirrups are as sturdy as they come, made from certified, anodized aluminium. So, they're lightweight but mean business. Safety Mechanism These stirrups come with a nifty hinged safety mechanism. If things go pear shaped, the stirrup opens up to free your foot. The foot stop ensures it