For those seeking more energy from their runs, adidas designed the Ultraboost 5, which uses a redesigned LIGHT BOOST midsole filled with 9 millimeters more foam under the heel and forefoot, allowing for reduced weight, greater shock absorption, and 2% more energy return in the forefoot compared to the Ultraboost Light 1.
How? The Boost-filled midsole, which offers higher responsiveness and absorption in the heel and transitions immediately back to its original shape as the runner's foot strikes the ground, allowing them to go further while expending the same amount of energy.