adidas adiStar Boost ESM running shoes combine traditional foam for stability with BOOST™ cushioning technology to provide soft and smooth landings and transitions. These running shoes have a sleek and speedy look to help keep you motivated toward reaching your goals. And with the addition of ESM upper technology, you'll have the added benefit of four-way engineered stretch mesh over your feet. Perfect for runners looking for exceptional bounce and cushioning.Upper: techfit™ provides lightweight and flexible support. Flat laces reduce irritation and pressure points. techfit™ ESM is composed of seamless four-way engineered stretch mesh which creates the ultimate fit via the combination of strategically placed techfit™ support and mesh breathability. Welded TPU bands hold the foot securely in place through the run cycle. Padded tongue and heel collar enhance instep comfort. Flexible textile gives welded support and stability.Midsole: TORSION® SYSTEM delivers lightweight arch support that allows the forefoot and rearfoot to move independently for better surface adaptation and stability. BOOST™ offers supreme durability with soft and comfortable touchdown and a smooth transition to the forefoot. Removable insole. miCoach compatible. Outsole: adiWEAR™ offers optimum high-wear durability. External heel counter provides optimal heel fit and running comfort. FORMOTION® adapts to the ground to ensure the smoothest, most comfortable run. Continental™ rubber delivers optimal grip in wet conditions.