Girls' Nike Big Kid Air Max Invigor Running Shoes The Nike Air Max Invigor is a low-top lace-up sneaker designed for grade-school kids who need everyday athletic performance and comfort. The lightweight mesh upper keeps feet cool and ventilated during active wear, while the Max Air unit in the heel provides cushioned support with each step. Flex grooves in the outsole allow natural foot movement, and the padded collar and tongue add comfort around the ankle.