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