"The adidas adizero Boston 12 is a high-performance daily trainer that has been upgraded to offer a more comfortable and faster ride. The highlight of the Boston 12 is found in the midsole where we see a carefully crafted setup that increases both the shoe's softness and speed. The top layer is made of Lightstrike Pro, which is the brand's lightest and softest foam, while the frame is made of the slightly denser Lightstrike 2.0 foam that helps to maintain a stable and smooth ride at any speed. Sandwiched between the two layers is the ENERGYRODS 2.0 system, which comprises split rods that provide a snappy and energetic toe-off while allowing for flexible foot movement. The outsole of the Boston 12 is equipped with strategically placed layers of lightweight Continental rubber that provide reliable traction in any weather condition, and in the upper, an ultra-lightweight recycled mesh provides the structure needed for longer efforts while remaining highly breathable to keep your feet comfortable with every mile. "