BOOST: Boost is an industry leading and revolutionary cushioning technology which gives the ultimate energy return. | BOOST: Boost is our most responsive cushioning ever: The more energy you give, the more you get | ENGINEERED MESH:A PREMIUM UPPER MATERIAL THAT PROVIDES A HIGHLY COMFORTABLE AND ADAPTIVE FIT. | ENGINEERED MESH:A PREMIUM UPPER MATERIAL THAT PROVIDES A HIGHLY COMFORTABLE AND ADAPTIVE FIT. | ENGINEERED MESH: Breathability and support in specific areas where needed. | ENGINEERED MESH: Breathability and support in specific areas where needed. | ENGINEERED MESH: optimal zoning for breathability, stretch and support. | ENGINEERED MESH: optimal zoning for breathability, stretch and support.