Women's Adidas Terrex Agravic Speed Ultra - Race Day Trail RunnerSay "hello" to the Women's Adidas Terrex Agravic Speed Ultra The story told by Adidas was 2023 Western States winner Tom Evans wanted the trail running equivalent of the Adidas Boston. So, Adidas took the famous Lightstrike Pro midsole and combined it with TPU Energy Rods. This created a highly responsive race day trail shoe that remains nimble on variable terrain. Unlike carbon plates the 4 TPU Energy Rods act as an extension of our metatarsal bones