Vivobarefoot Gobi Boot Juniors Bracken Synthetic The updated Altra EGO™ midsole The updated Altra EGO™ midsole foam ensures a comfortable connection to the ground 5) Heel to Toe Drop 0mm Stack Height 25mm Midsole Altra EGO™ midsole foam Outsole Vibram® Megagrip outsole for exceptional traction on wet and dry terrain Upper GORE TEX Invisible Fit upper with 85% recycled polyester and soft rolled mesh for lightweight waterproof comfort FootShape™ Fit Original FootShape™ Fit for maximum toe room and natural toe splay Cushioning Mid Support Neutral Best Use Trail running kicking and keeping warm along the way its classic lace up design is crafted from flexible Wild Hide chrome free leather