Men's Altra Experience Flow ST - Blue/Grey Formerly known as the Experience Form, the Altra Experience Flow ST is their go-to stability running shoe. With this update, Altra redesigned the heel collar for extra comfort and enhanced the softer mesh's breathability. A refined tongue offers better in-motion flexibility, so all your group meetups, routine weekly miles, and daily errands feel more easygoing and enjoyable. Matching the Flow 3, the same enjoyable EGO P35 foam takes care of your feet and joints. It's tuned to be just slightly plusher than before, easing your landings as the miles add up while keeping its lightweight balance of subtle bounce. However, the ST features a broader footprint than the Flow 3, especially through the midfoot, for improved stability and controlled pronation. With generous rubber coverage on the outsole, the Altra Experience Flow ST stability running shoe gives you durability to last for all your daily training. Step in, find the confident guidance you want, and settle into your flow for mile after mile. DETAILS: EGO™ P35 is a compression-molded OBC (olefin block copolymer) blend, created for lightweight, balanced, and smooth running economy. It combines with a new sockliner for an improved underfoot feel.  Subtle rocker geometry assists easy transitions while feeling more planted and stable than the neutral Flow. Rubber compound delivers an excellent blend of strong grip, natural adaptability, and improved durability. Engineered sandwich mesh creates a softer feel with stylish breathability and incorporates a refreshed heel collar.   Standard FootShape™ fit is Altra's most common, right in the middle of Original and Slim. It gives your forefoot room for its natural alignment, allowing your foot to act as a strong and stable foundation.