Merrell Women's Siren Edge Hiker 100% Mesh Imported Vibram sole Athletically styled hiker featuring seamless upper overlays with color-pop webbing and ghillie laces Breathable mesh lining ; Molded nylon arch shank Bellows tongue to keep out debris M-Select FIT.ECO contoured footbed with organic odor control, Merrell air cushion in the heel absorbs shock and adds stability Shock-absorbing air cushion heel. 4mm lug depth Vibram traction outsole