SIREN 4 GTX Trail Running Double-wall vacuum insulation to keep

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

Pull-forward hip fins

An innovative kids' life jacket

Articulated sleeves for optimal mobility

warm on the inside| With advanced thermal insulation and cosy fleece lining you'll stay warm all winter

SIREN 4 GTX Trail Running Double-wall vacuum insulation to keep25 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