25 years of Merrell´s women´s-specific fit.The Siren 4 is uniquely engineered to cradle the distinct contours of female feet, providing comfort, support, and stability even on the longest hikes.FEATURES:-GORE-TEX® waterproof membrane, exceptional breathability and waterproof performance.-Breathable mesh and TPU upper.-100% recycled laces and webbing.-Bellows tongue keeps out debris.-Protective and abrasion resistant rubber toe cap.-100% recycled breathable mesh lining.-100% recycled mesh footbed cover.-Cleansport NXT™ treated for natural odor control.-Removable PU footbed.-Rock plate for protection.-FloatPro™ Foam midsole for lightweight comfort that lasts.-Vibram® TC5+ outsole provides exceptional traction for outdoor multi-sport activities, formulated exclusively for Merrell.-Vibram® traction lugs specifically designed to increase traction and shed debris with each step Stack Height:28.5-20.5mm Drop:8mm Lug:5mm Vegan-Friendly 1lbs-7.97oz, 680g.