Using an ultra-flexible outsole with cleverly positioned flex grooves that follow the natural volume curve and movement of the foot, we've really embraced the sports luxe trend with this athletic sandal. Try them on and feel the difference. Trigenic System: Ultralight, gait-reactive flex and engineered deconstruction, a foot-shaped fit and responsive cushioning. Thick crossover straps and suede linings add breathable comfort. A sporty riptape strap fastens behind the heel.