Merrell Women's Siren 4 Thermo Mid Zip Waterproof Hiking Boot

A winter-ready boot with a women's-specific fit that combines function and all-day wearability.

Features

• 200 grams Primaloft® Gold Eco Series synthetic insulation
• Solarcore® Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra-thin
• Waterproof full grain leather upper, complete with a waterproof membrane seals out water and lets moisture escape
• Vibram® Icetrek outsole designed to provide the improved grip on very cold, icy, or snowy surfaces
• Heavy-duty, Waterproof, YKK zipper for easy on and off
• Protective and abrasion resistant rubber toe cap
• Cleansport NXT™ treated for natural odor control
• FloatPro™ Foam midsole for lightweight comfort that lasts

Specs

Most orders ship within 1 business day

During busy seasons, processing may take up to 2 days

Same‑Day Shipping

Mon–Fri: Orders placed by 12 PM EST
Saturday: Orders placed by 10 AM EST
Orders placed after these times, on Sundays, or on holidays ship the next business day

Free Shipping
Free shipping on all U.S. orders over $75 (continental U.S.)

Carriers Used
Orders ship via USPS or UPS
Weekend/late‑Friday orders may ship USPS to meet timing requirements

Alaska, Hawaii, Military & U.S. Territories
Shipped via USPS Standard/Priority Mail
Typical transit times:
AK/HI/Territories: ~3 days (not guaranteed)
Military addresses: 10–15 days

Transit Times
USPS Priority Mail may display “1‑Day,” “2‑Day,” or “3‑Day,” which reflects USPS’s estimate after the package ships
These estimates do not include processing time.

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