Merrell Siren 4 Thermo Mid Waterproof Boots

Color: Hazel
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Style No.99866188;Color Code:020

Made for glistening winter hikes, these warm, waterproof boots from Merrell are cozy and comfortable, featuring full-grain leather and knit uppers, recycled laces and fleece lining, and 200 grams of insulation to keep you dry all season long.

  • Waterproof full-grain leather and knit uppers
  • Lace-up, hiking boot style
  • 200 grams of Primaloft® Gold Eco Series synthetic insulation
  • Abrasion-resistant rubber toe cap
  • Cleansport NXT™ treated for natural odor control
  • FloatPro™ Foam midsole for lightweight comfort
  • Solarcore® Aerogel insole for warmth and flexibility
  • Vibram® Icetrek outsole for grip on icy and snowy surfaces

Measurements

  • Shaft Height: 5.91 in

  • Care

  • Contents

    Full-Grain Leather and Knit Uppers 100% Recycled Laces And Webbing 100% Recycled Fleece Lining 100% Recycled Mesh Footbed Cover 5% Recycled PU Removable Footbed
  • Origin

    Import

US Shipping

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Below are estimates, the dates shown at checkout will be the most accurate.

Shipping Methods Estimated Delivery Price
US Standard 5-8 business days FREE!
US Express* 2-3 business days $10.00
US Overnight* 1-2 business days $20.00

*Orders to PO boxes, Alaska, Hawaii, APO/FPO addresses, and US territories cannot be expedited.

In-Store Pickup

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US Returns

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Holiday Return Policy: Purchases made from 10/1/2025 to 12/24/2025 may be returned for original form of payment through 1/31/2026 when returned in original condition.

Gift returns can be exchanged or refunded for the value indicated on the gift receipt and refunds will be made in the form of a merchandise credit.

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Return Policy Refund Method
Return received within 30 days from delivery Original form of payment
Return received after 30 days from delivery e-gift card (warehouse) or merchandise credit (store)

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