HEAD Revolt Indoor Men’s Indoor, Squash, Racquetball Shoes Raven/Red : The new HEAD Revolt Indoor shoes offer a blend of stability, cushion, and durability for powerful weapon on the court. The upper features a nice update with reduced weight and high-end breathability. Aside from a truly comfort-driven fit and feel, this version continues to provide much needed medial and lateral stability when moving quickly between shots. Upper: Breathable lining and mesh upper material. Durable synthetic leather accents. Features Drift Defense medial protection. Energy Frame TPU heel stabilizer. Midsole: Mesh sock-construction provides enhanced comfort. Low to ground EVA midsole. TPU midfoot shank for torsional stiffness. Outsole: Non-marking indoor outsole rubber.