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The women’s Merrell Siren 4 Thermo Mid Zip WP snow boots are suitable for intensive use in winter conditions, thanks to a Waterproof membrane and PrimaLoft® Gold insulation that effectively protects against the cold. They feature a Vibram® rubber outsole for stability on slippery surfaces and FloatPro™ Foam for cushioning while walking. The design is completed with laces made from 100% recycled materials, while an additional SOLARCORE® insole enhances thermal comfort in low temperatures.

Basic data

Brand Merrell
Country of origin of the brand USA
Sport Tourism, Bushcraft
Gender Woman
Season Autumn/Winter
Leading colour Brown
Model/product code Siren 4 Thermo Mid Zip WP J038764
Code 2000175379

Product details

Upper material Leather + fabric
Lining Fleece
Type of filling Synthetic
Height of the upper High
Reinforcements Partial lagging
Reflective elements No
Fastening type Laces
Technologies Waterproof, YKK®, PrimaLoft® Gold, Vibram®, FloatPro™ Foam, SOLARCORE®, NXT®
Weight per item 540 g

Outsole

Thickness of the sole 2,5 cm
Compatibility with crampons No

Protection

Insulation Yes

Warnings and producer's data

Producer Wolverine World Wide, Inc. | 9341 Courtland Drive NE, Rockford, MI 49351, USA | ConsumerPrivacy@wwwinc.com | ORBICO Spółka z ograniczoną odpowiedzialnością | ul. Salsy 2, 02-823 Warszawa Polska | info.pl@orbico.com

Women's snow boots Merrell Siren 4 Thermo Mid Zip WP hazel (J038764)

Women's snow boots Merrell Siren 4 Thermo Mid Zip WP hazel are ideal footwear for women looking for reliable protection on winter adventures. Featuring a high upper, they provide excellent thermal insulation and protection from harsh weather conditions. Made from high-quality materials, these snow boots use Waterproof technology, which guarantees complete waterproofing and protects feet from moisture and snow.

Advanced protection technologies

Women's snow boots Merrell Siren 4 Thermo Mid Zip WP hazel use PrimaLoft® Gold technology, which provides exceptional insulation, even in the most extreme conditions. In addition, SOLARCORE® technology supports thermal protection by retaining heat inside the boot. This allows wearers to enjoy warmth and comfort even in low temperatures.

Comfort and stability

Thanks to the Vibram® outsole, snow boots Merrell Siren 4 Thermo Mid Zip WP hazel deliver excellent grip on slippery surfaces. FloatPro™ Foam provides lightweight cushioning, making them comfortable to wear over extended periods. In addition, the NXT® insole gives the boots antibacterial properties, helping to keep the inside of the footwear fresh.

Eco-friendly

Women's snow boots Merrell Siren 4 Thermo Mid Zip WP hazel are made from recycled materials, highlighting Merrell's commitment to protecting the environment. The laces are 100% recycled, further demonstrating the manufacturer's eco-friendly approach to footwear design. They are an excellent choice for those who value environmentally friendly products.

Women's snow boots Merrell Siren 4 Thermo Mid Zip WP – features:

  • Waterproof technology for complete waterproofing;
  • Thermal insulation thanks to PrimaLoft® Gold and SOLARCORE®;
  • Vibram® outsole for excellent grip on slippery surfaces;
  • FloatPro™ Foam for lightweight cushioning;
  • NXT® insole with antibacterial properties;
  • High upper for better protection from snow;
  • Made from recycled materials to protect the environment;
  • 100% recycled laces highlighting the eco-friendly approach;
  • Boot weight: 1080 g.

Product Details

Women's snow boots Merrell Siren 4 Thermo Mid Zip WP hazel

High upper protecting the foot

The built-up shaft effectively shields the foot from snow and moisture while moving in challenging terrain. Its height limits the exposure to cold elements from the outside, protecting the leg along its entire length in deep snow. When walking through drifts, the user can rely on a barrier that protects the feet from getting soaked even in adverse weather conditions.

Women's snow boots Merrell Siren 4 Thermo Mid Zip WP hazel

Vibram® sole with excellent grip

During a march on snow-covered or icy trails, the Vibram® sole provides secure contact with the ground. The contoured tread effectively supports movement, minimising the risk of uncontrolled slipping on changing winter surfaces. Even with sudden changes in pace or direction, every step maintains predictability and safety.

Women's snow boots Merrell Siren 4 Thermo Mid Zip WP hazel

Waterproof technology and water resistance

The use of Waterproof technology effectively isolates the interior of the shoe from external moisture. This solution blocks the penetration of water and snow while walking on wet or snowy terrain. During long walks in winter conditions, feet remain dry, regardless of the intensity of precipitation or melting snow underfoot.

Waterproof
WATERPROOF technology is based on a waterproof rating of 10,000 mm, the use of thermally sealed seams and waterproof zips.
YKK®
Designation of the reliable zippers of the Japanese brand YKK®, used in high-end sportswear and accessories.
PrimaLoft® Gold
The primary representative of the most technologically advanced PrimaLoft® insulation in the Gold series. This insulation can be found, among others, in specialised mountain and sports clothing. It is characterised by its versatility, but at the same time has very high parameters.
Vibram®
It comes in more than 100 types (including.
FloatPro™ Foam
Foam in the midsole of Merrel shoes. It is soft, lightweight and resilient, offering a high level of cushioning and comfort.
SOLARCORE®
SOLARCORE® technology is an insulation that is a fully vegan and cruelty-free alternative to feather-filled jackets. It provides warmth and protection comparable to traditional insulation methods without causing animal suffering.
NXT®
This solution is based on natural microorganisms that actively neutralise the molecules responsible for unpleasant odours. Instead of masking them, the microflora breaks them down at the source, activating when it comes into contact with moisture and body heat. The result is long-lasting freshness, even with intensive and repeated use.
  1. 100%

    plŁuki

    Comfortable

    Bought for my girlfriend – cosy and warm

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  2. 100%

    plDamian

    Merrell shoes

    Great shoes wife satisfied

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  3. 100%

    plPati

    Excellent

    Very comfortable and warm. They proved themselves in the mountains and on forest paths. Ideal for cold weather.

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  4. 100%

    plPati

    Super

    Super shoes for winter. Warm and comfortable. They have proven themselves on forest paths, in the mountains and on asphalt.

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  5. 100%

    plMonika

    Convenience

    The boots are very comfortable, warm, the zipper makes them easy to put on. Ideal for winter.

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  6. 20%

    plMonika

    Slider problem

    The shoes are made of very good quality materials. Soft, light and comfortable. But I tried on 5 pairs and each had a problem with a badly sewn zipper.

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  7. 100%

    plEwa

    Super

    Shoes as expected, well sized according to the manufacturer's table, super light and comfortable.

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  8. 100%

    plKasia

    Revelation

    My first snow boots and my first encounter with Merrell. A shot in the arm. The boots are great. Comfortable, warm, zipper makes them easy to put on. They didn't get wet in the snow. Warm feeling from the sole when walking. Technically a revelation and visually very nice.

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  9. 100%

    czLinda

    Great

    Perfect comfortable shoes. I ordered a size 1/2 size larger and they fit well.

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Women's snow boots Merrell Siren 4 Thermo Mid Zip WP hazel

Women's snow boots Merrell Siren 4 Thermo Mid Zip WP hazel

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Women's snow boots Merrell Siren 4 Thermo Mid Zip WP hazel

Size Sizes table
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Sizes table
    EU size 36 37 37.5 38 38.5 39 40 40.5 41 42 42.5 43
    UK size 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9
    US Size 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5
    AB Insole length (cm) 23 23.5 24 24.5 25 25.5 26 26.5 27 27.5 28 28.5

    How to measure insole length - instructions in 3 steps

    1. Remove the insole from a shoe that fits well on your foot and place it on a flat, hard surface.

    2. Mark the tip of the insole (the furthest point near the toe) and the back of the heel.

    3. Measure the distance between the marked points with a ruler or tape measure - this is the length of the insole, which should be compared with the size chart.

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