Introducing Puma's First Hiking-Specific Shoe: The Explore Nitro Mid. It's Designed For All Trails, From Flat And Gravelly To Steep And Rocky, With A Combination Of Nitro Foam And Profoamlite Through The Midsole Maximizing Comfort Over Any Terrain. Throw In A Pumagrip Atr Outsole And A Unique Collar Shape – Complete With Integrated, Heel Supporting Lacing System – And You Have Your Next Trail Companion. Get Ready To Tackle And Terrain, No Matter The Season.