The Merrell Siren 4 Thermo is uniquely engineered to cradle the distinct contours of female feet, providing comfort, support, and stability even on the longest hikes with added insulation for warmth and protection.
Ankle height
Waterproof membrane
Bungee lace with toggle closure
Bellows tongue keeps out debris
200 grams Primaloft® Gold Eco Series synthetic insulation
Rock plate for protection
Rubber toe and heel for durability and protection
FloatPro Foam™ midsole for a lightweight ride that lasts
Materials
Upper: full grain leather and wool Lining: recycled fleece Outsole: Vibram Icetrek
Size Guide
Women's style listed in US sizing.
Fits true to size. We recommend taking your normal size.
gravitypope uses Canada Post for domestic and international orders. Orders over $300 receive free shipping within Canada and orders over $700 receive free shipping within the United States. Overnight service is not available at this time. We are unable to ship apothecary and fragrance items. For more details visit our shipping page. We accept RA requests for exchanges or returns adhering to our returns & exchanges policy.
About the Designer
Merrell is a global leader in outdoor active footwear, founded in the USA in 1981 based on Randy Merrell's comfortable and functional hiking boots. They are focused on merging performance, styling, and comfort to empower all people to confidently explore the outdoors.