Men's Altra Provision 8 Men's Trail A redesigned upper feels light Sleeveless A redesigned upper feels light on the foot while still delivering the supportive fit that has defined Mizuno running shoes for years The X10 rubber should provide plenty of outsole durability and this could be a workhorse for many miles to come Your updated Altra Provision 8 running shoes are newly crafted with Medial GuideRail™ technology enabling you to enjoy inherent stability that never oversteers as you journey further than before the Altra Provision 8 offers extra support for runners and people who want to stay comfortable while on their feet all day