Special Design Features - Optimized Multi-Directional Breakover Relief - The Aluminum PLR shoe is made of a forged aluminum alloy that is heat treated for added hardness. This combination offers a light, yet durable shoe for optimal performance. Possible Uses The Aluminum PLR Shoes are used for a wide variety of disciplines ranging from hunter & jumpers to gaming & speed event horses. Show horses and rodeo performance horses find the wide-web aluminum to be beneficial for traction, and the design helps keep the horses from interfering & forging.