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.

? 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
? NXT treated to prevent odor
? 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