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Merrell
Siren 4 Thermo Mid Zip WP Boot - Women's

4.171717171717172 out of 5 stars
99 Reviews
$179.95
Color:Black

Size:

Size Chart

Quantity

Only 3 In stock


Why We Like The Merrell Siren 4 Thermo Mid Zip WP Boot

When we won't let winter interrupt our hiking addiction, we slip into the Merrell Siren 4 Thermo Mid Zip WP Boot to keep from slipping and sliding on the trail. This winter hiking boot is snowproof with its waterproof membrane and full-grain leather uppers, and it's built to keep our feet warm with 200g Primaloft Gold Eco insulation packed inside. Snow and ice would keep us inside, either, thanks to Vibram Arctic Grip rubber outsoles, which are made for cold and slippery winter conditions. Made with a women-specific fit, the Siren 4 Thermo lets us enjoy 4-season hiking with warm feet and good grip on snowy and icy surfaces.


Details

  • Insulated winter hiking boots with a women-specific fit
  • Leather uppers are durable and weather resistant
  • Proprietary membrane adds breathable waterproofing
  • Medial zippers make boots easy to slip on and off
  • 5mm lugs dig into snow for better traction
  • Moderate 8mm heel to toe drop cushions our heels
  • Protective toe cap to prevent stubbed toes
  • Cleansport NXT treatment for odor control
  • Item #MERZ2TH
Responsible Collection
Recycled/Repurposed
Upper Material
full-grain leather, synthetic knit
Waterproofing
Merrell Dry
Insulation
200g PrimaLoft Gold Eco (recycled polyester)
Lining
100% recycled fleece
Closure
lace, zipper
Footbed
PU, Solarcore Aerogel
Midsole
FloatPro Foam
Sole
Vibram Arctic Grip
Shaft Height
ankle
Claimed Weight
[single] 1lb 3oz
Manufacturer Warranty
limited lifetime
Activity
winter hiking, casual

What do you think about this product?

Overall Rating

4 based on 99 ratings

Review Summary

1 Stars - 8 reviews
2 Stars - 7 reviews
3 Stars - 7 reviews
4 Stars - 15 reviews
5 Stars - 62 reviews

Customer Images

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1 out of 5 stars

March 18, 2025

Too narrow

Too tight in the toes even went up a half size. Wish they made a wide width.

LR
Merrell

Originally reviewed on Merrell

5 out of 5 stars

March 10, 2025

Awesome boots!

Unbelievably comfortable and very light. Definantly run a bit small. I ordered one size up after reading reviews, and glad i did. Arrived really quickly too.

Ruby Faith
merrellaustralia.com.au

Originally reviewed on merrellaustralia.com.au

1 out of 5 stars

February 28, 2025

Not recommend, I bought last year, it very slippery on ice. You can't walk even one step.

Na Na
Merrell

Originally reviewed on Merrell

2 out of 5 stars

February 21, 2025

Dislike the side zipper and tie up.

These boots state they are hiking, well don’t hike through a lot of snow. The moisture will soak through the laces and my side zipper comes down when I don’t noticed while snow ends up in my shoe. Just disappointed with these boots. They shouldn’t say hiking. More like casual wear, or casual hiking that doesn’t require you to track through snow that’s almost to your knees because your feet will soon be soaked.

user image
Red
Merrell

Originally reviewed on Merrell

4 out of 5 stars

February 14, 2025

My feet feel warm, snug, cozy - and happy!

I thought about returning these boots because I wasn't sure I would get enough use out of them here in the Pacific Northwest. ..but then it snowed....and I was very glad to have them. I got my usual size, which is almost a bit big in these particular boots, but that's ok because I can wear thick socks in them. I hope they soften up a little so that I can snug up the laces to get the fit even snugger, but I will add another insole if necessary to help with that. The boots so far are keeping my feet warm and cozy, and seem to have a good grip on medium to hard packed snow, though of course not on ice. I especially love how they keep my ankle feeling warm and protected. Unfortunately I am so far not able to get the boots off with by just unzipping them, which is disappointing, as that was a key reason I opted for these boots. That problem may be because I have a fairly low volume foot, and I have to tighten them to the max to get the snug fit I want. However, having bought them on sale, they are still a great value, and I look forward to wearing them for years to come because overall I love how warm, cozy and secure my feet feel in them, and how that makes me feel safe and confident as I stride along in snowy conditions. I am a firm believer in keeping my feet (and ankles!) happy, and these boots do the job.

Hello good buy
Merrell

Originally reviewed on Merrell

3 out of 5 stars

February 2, 2025

Not for walking

These are very warm and relatively comfortable. However, the traction is non-existent. Unless you have a clear path or powdery snow you will slide all over the place. I tried walking on packed snow and hurt my knee because my foot slid immediately.

kcalmeyn
Merrell

Originally reviewed on Merrell

5 out of 5 stars

February 1, 2025

Please keeping making them

These shoes are amazing, and I’m saddened that they are not made anymore. I was hoping in buying them for my daughter next winter since they didn’t have her size this year. I love mine, they are warm, very comfortable, and easy to put on with the zipper. I hope they change their minds and bring them back next winter!

Lid23
Merrell

Originally reviewed on Merrell

5 out of 5 stars

February 1, 2025

Love my Merrells

Took my Merrells to Iceland in December. They were warm, and comfortable for walking a lot. Just what I was looking for!

user image
Rosemari K
Merrell

Originally reviewed on Merrell

5 out of 5 stars

January 26, 2025

Siren 4 Thermo mid zip waterproof boots, perfect.

They fit perfect and are so warm and comfy, would buy again

Tania
Merrell

Originally reviewed on Merrell

5 out of 5 stars

January 25, 2025

Love them!

Love these boots! Very warm and comfortable, very pleased!

Nicole
Merrell

Originally reviewed on Merrell

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