The experience flow, formerly known as the altrafwd experience, is all about a ride that’s smooth, effortless, and efficient. glide through daily workouts, crush long training runs, and smile through miles with the run club crew. featuring an updated two color engineered mesh for greater breathability. a low 4mm drop complements the shoe’s rocker shape geometry for an efficient toe off and a smooth, quick roll through your stride. it’s got the same lightweight and responsive compression molded midsole foam for performance. with altra’s signature FootShape Fit, you get a roomy toe box and a secure midfoot, so you can move the way you were designed to. get into the flow and experience an effortless run!