Rubber sole Breathable woven fabric in the upper is durable for lasting comfort and support Nike Air-branded strap crosses over the top of your foot for a more secure fit. Steady Comfort The foam midsole with Max Air unit in the heel brings stability and high-performance cushioning to every step. The raised edging braces your foot during side-to-side movement. Smart Traction The flat sole helps keep you stable on gym surfaces while the rubber tread gives you more grip. The Nike Air Max Bella TR 5 Premium combines the bounce and beauty of Max Air cushioning with a flat sole that lends a stabilizing advantage while you tone and sculpt with weight. This updated design increases the containment and support around the sides and top of your foot to help keep you steady on your feet and secure during demanding strength workouts.