The FormLite XT Ultra is a sleeker, fitter version of its former self and can keep up with your every crunch, bend, and kick. (No joke. You can fold this baby in half and pack it away in your gym bag. Or wear it for swifter, chicer cardio classes.) Evolved and geared for fit and flex, it's lightweight with an aerodynamic design. The form-fitting upper, done up in the brightest of brights, is equipped with breathable open mesh and hot-melt overlays for a slim-and-trim aesthetic. The midsole is cushioned with lightweight EVA, while rubber pods at the outsole provide grip. Finally, the feather-inspired outsole's cutouts create flex grooves which reduce weight and maximize performance. Which means stronger, steadier twists and turns and trucking through 45 minutes and then some. Synthetic. Rubber sole. Pretty meets performance in this lightweight, flexible cross trainer. Lightweight double-layered mesh upper for increased breathability and comfort, with bonded overlays for a minimal, flexible, and comfortable fit. MoveCELL designation for its highly flexible, adaptive design engineered to enhance and maximize your body's natural movement. Injected EVA midsole for superior cushioning and enhanced comfort; carved-out design for lighter weight and 360-degree flexibility. Breathable OrthoLite sockliner for optimum fit and comfort.