Nike Flex Control 4 Men's Workout Shoes FLEXIBILITY MEETS DURABLE STABILITY. Emphasizing lightweight comfort and stability, the Nike Flex Control 4 is tailored to explosive workouts. Its lightweight, flexible upper has a midfoot strap for stability, while the sole has deep flex grooves to let your foot move naturally. Lightweight Support Abrasion-resistant mesh is lightweight and breathable to help keep your feet comfortable. Sturdy Stability Rubber on the side of the forefoot gives you support during side-to-side movements. The laces tug down on the strap to hold your foot while you move. Natural Movement Nike Flex sole lets your foot move naturally. Textured rubber tread outlines the sole for durable traction and stability.