Features of the Merrell Women's Siren Traveller Q2 Shoe Nubuck, suede leather and mesh Upper Traditional lace closure Bellows tongue keeps debris out Breathable mesh lining Kinetic Fit Tri removeable contoured insole provides light support to all three arches of the foot Q FORM 2 Dual-Density Midsole with heel-centering Technology provides genderengineered alignment and comfort Merrell Air Cushion in the heel absorbs shock and adds stability 3.5mm lug depth Sweat and moisture Breaks down odor causing microbes in shoes Infused into shoe lining and materials Tear resistant durable Outsole Self-cleaning lug design Angled Lugs cut through terrain Highly slip-resistant traction Grips in any weather