Merrell Women's Siren Sport Q2 Shoe 100% Nubuck leather and mesh Imported Rubber sole Nubuck leather and mesh upper Metal hook and lacing eyelet for secure lacing. Merrell air cushion in the heel absorbs shock and adds stability Merrell m select fit.tri blended eva contoured footbed supports all three arches of the foot Qform 2 dual-density midsole with heel-centering technology provides gender-engineered alignment and comfort M select grip tunes each outsole with durable traction that grips when and where you need it