Joe Rocket Speedmaster 3.0 Men's Leather Race Boots (Black, Size 11) Perforated split grain leather upper for excellent breathability; Articulated ankle design for added mobility Reinforced ankle for increased lateral rigidity and protection; Injection molded shin, heel, and ankle armor Reinforced Titanium ankle plate; Combined Velcro and zipper enclosure reinforced by a ratchet strap for an ultra-secure fit replaceable magnesium toe sliders Additional magnesium sliders on heel and calf; Variable closed cell foam cushioning throughout; Antibacterial replaceable foot bed TPU mid-sole reinforced with steel shank for improved distribution between stiffness and flexibility