The plyometric tool that grows with you, the Cortex Soft Plyo Box 15cm gets you jumping higher and higher. Part of a modular set, our Soft Plyo Boxes are designed to be used in combination to progress with you as you improve, or give you access to different exercises. To support stacking, the boxes have Velcro tabs that lock boxes in place to stabilise them through intense workouts. The 15cm box on its own is perfect for beginners, and lets you tackle step-ups and step-overs.