Tecnica Size Chart The warm, comfortable Apollo slippers feature all the iconic elements of the after-ski MOON BOOT. Neoprene inserts guarantee maximum comfort while the silicone-injected sole ensures an outstanding grip on indoor floors. The elastic strap at the back is marked with a MOON BOOT logo. Features: - Nylon upper with neoprene inserts - Adjustable drawcord laces - Silicone injected sole