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