Special Design Features - Optimized Multi-Directional Breakover Relief - Slight Heel Taper to Help Re-Direct Energy & Encourage a Longer Stride - Lighter, Narrower Web for Speed Events & horses with Smaller Feet - Steep Inner Rim to Help with Traction in Arena Surfaces - 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.