New unused ATI Athletic Training Innovations Circle Sole Raised Shoes US Men Size 12.5 Plyometric shoes INCREASE VERTICAL JUMP – With our training shoes you can increase your vertical jump by 5-10 inches. Focus on jumping higher, running faster and being more powerful. INCREASE FAST TWITCH MUSCLE – working out properly with our plyometric training shoes allows you to increase the fast twitch muscle we use for powerful burst of movements like jumping or sprinting. INCREASE YOUR SPEED – Increasing the strength of your fast twitch muscles allows you to lower your 50M dash time by 2/10th of a second. INCREASE CALF MASS AND DEFINITION – shoes will define you calf muscles and increase the reactive strength / agility