HIIT, mountain climbers, squat jumps? No problem. Here's an ultra-flexible training shoe built for feel-good workouts. Key features X-shaped Speedboard® for forefoot flex and versatility Helion™ superfoam midsole for comfort and soft landings Midfoot cage provides extra support and stability Excellent heel hold during multilateral movements Breathable recycled mesh upper Plush materials in the heel and tongue for enhanced comfort Rubber outsole for traction during side-to side movements