Low-Profile Design: The low-profile heel and rubber toe cap enhance heel hooking and precision. Extreme sensitivity combined with high dynamism allows the Theory to have unprecedented pedidextarity and reactivity on holds. Climbers looking to take their comp style to the next level need look no further. An aggressive yet ultra-sensitive slipper with a single hook and loop closure locks the heel in. They offer top to bottom sticky rubber and an all-new hybrid sole that combines No-Edgeâ„ features to adapt to the futuristic footwork required for modern competition climbing.