ALTRA MEN'S PROVISION 5 The Provision has proven itself, and with this updated version comes plenty of updated features. Simplified mesh construction and an improved heel provide a better locked-in feel. The refined InnovArch feature offers a more tailored fit and encourages a more natural step cycle. The GuideRail brings additional medial support that’s only there when it’s needed. The Provision 5 is comfortable, supportive, and ready for your long runs. FEATURES Weight: 9.2 oz / 261 gInsole: 6mm Contour FootbedMidsole: Ultralight EVA Top Layer and InnerFlexOutsole: Rubber FootPodCushion: ModerateStack Height: 27 mmUpper: Engineered Mesh Our signature FootShape comfort gives your feet more space to sit naturally and is designed to address biological differences in men's and women's feet. Our Balanced Cushioning platform positions your heel and forefoot at an equal distance from the ground, encouraging better alignment, better form, and a low impact landing. These grid-like grooves in the midsole are designed to provide flexibility and movement. This outsole technology actually maps the bones and tendons of your foot to encourage natural movement underfoot. The GuideRail acts like a supportive highway guide rail that encourages natural foot placement by provides guidance, but only when it’s needed. Our innovative arch support feature offers a customized and secure fit while encouraging a natural foot placement in each step.