Waterproof Mesh and 3D print mesh upper Breathable Mesh lining Bellows tongue keeps out debris Merrell M Select FIT.ECO blended EVA contoured footbed with organic odour control Merrell air cushion in the heel absorbs shock and adds stability Moulded nylon arch shank 4.5mm lug depth Make your way with Merrell's Siren Edge Waterproof Women's Walking Shoe. The Siren Edge features a DRY impermeable membrane that keeps out water but lets moisture escape. Together with the breathable mesh lining, your feet will stay dry. Made for all-day comfort, the M Select FIT.ECO blended EVA contoured footbed and Merrell air cushion in the heel absorbs shock and adds stability, step after step.