SIREN 4 GTX Trail Running Hybrid construction

Hybrid construction

POCKET POWER

Double-wall vacuum insulation to keep your espresso shots fresh or cold brew nice and cold though long hauls

Peripheral hood adjustment

SIREN 4 GTX Trail Running Hybrid construction25 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