• 4 Pairs Women Knee High Socks Extra Long Smooth Thigh Grip Black Thermal Sock UK 4-7 by Heatwave Thermalwear UK 4-7 / BLACK Socks
  • 4 Pairs Women Knee High Socks Extra Long Smooth Thigh Grip Black Thermal Sock UK 4-7 by Heatwave Thermalwear UK 4-7 / BLACK Socks
  • 4 Pairs Women Knee High Socks Extra Long Smooth Thigh Grip Black Thermal Sock UK 4-7 by Heatwave Thermalwear UK 4-7 / BLACK Socks
  • 4 Pairs Women Knee High Socks Extra Long Smooth Thigh Grip Black Thermal Sock UK 4-7 by Heatwave Thermalwear UK 4-7 / BLACK Socks
  • 4 Pairs Women Knee High Socks Extra Long Smooth Thigh Grip Black Thermal Sock UK 4-7 by Heatwave Thermalwear UK 4-7 / BLACK Socks
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Heatwave Thermalwear

4 Pairs Women Knee High Socks Extra Long Smooth Thigh Grip Black Thermal Sock UK 4-7 by Heatwave Thermalwear

£8.00 GBP
£8.00 GBP
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Size
Colour

Stay warm, stylish, and supported with the Heatwave Thermalwear 4 Pairs Women Knee High Socks. Designed to rise over the knee with a smooth, thigh-hugging fit, these black thermal socks combine advanced insulation with breathable comfort for all-day wear. Featuring reinforced heels and toes, moisture-wicking technology, and a soft, plush interior, they’re a winter wardrobe essential that pairs perfectly with boots, leggings, and cold-weather outfits. Available in UK size 4–7 (EUR 36–42), this value pack delivers premium warmth, durability, and everyday performance.

Key Feature 1: Durable and Long-Lasting

Description: Built from high-quality materials with reinforced heels and toes, these over-the-knee thermal socks are engineered to withstand daily wear. Their robust construction ensures long-lasting performance, season after season, without compromising on comfort or warmth.

Benefits: Enjoy reliable socks that keep up with your routine—ideal for layering with boots, complementing leggings, and completing winter outfits while delivering dependable insulation and a polished look.

Key Feature 2: Moisture-Wicking and Breathable

Description: Engineered with moisture-wicking technology, the breathable fabric actively draws sweat away from the skin and promotes airflow. This helps prevent overheating and keeps your feet feeling balanced and comfortable throughout the day.

Benefits: Say goodbye to sweaty feet and discomfort. The fresh, airy feel supports all-day wear—from commuting and office hours to walks and weekend lounging.

Key Feature 3: 95% Polyester, 5% Elastane

Description: Crafted with advanced insulating materials, these socks deliver exceptional warmth even on the coldest days. The plush, soft interior offers a cozy, cushioned feel, while elastane adds stretch for a smooth, stay-put fit that comfortably extends to the thighs.

Benefits: Enhanced coverage and warmth from knee to thigh, a flexible fit that moves with you, and superior comfort—perfect for indoor relaxing or outdoor activities.

Sizes

Available in UK size 4–7 (EUR 36–42). Designed to offer a comfortable, secure fit for everyday wear.

Colours Or Style Options

Classic Black only—timeless, versatile, and easy to style with boots, skirts, dresses, and layered winter outfits.

Care Guide

Machine washable at 40°C. Wash with similar colours to maintain appearance and longevity.

Why Choose This Product

Trusted brand: Heatwave Thermalwear is known for premium materials and reliable craftsmanship across essentials like t-shirts, long sleeves, long johns, trousers, and bedding.

Customer favorite: A go-to choice for warmth, comfort, and everyday versatility—ideal for cold-weather wardrobes.

Outstanding value: Pack of 4 over-the-knee socks offers excellent quality and performance at a great price.

All-day comfort: Soft interior, breathable construction, and stretch fit for easy wear with any footwear.

Style meets function: Sleek black design complements outfits while delivering dependable thermal protection.

Additional Information

Usability: Perfect for work, home, commuting, and casual walks. Versatile enough to wear with boots, trainers, or indoor slippers—great for layering in winter or lounging in comfort.

Warranty and Support: Backed by a satisfaction guarantee. If you’re not completely satisfied, our customer support team is ready to help with returns and exchanges.

Carbon-neutral shipping on all orders
5036kg
shipping emissions removed
That's like...
20627
kilometers driven by an average gasoline-powered car
We fund innovations in...
Direct Air Capture
Bio Oil
Mineralization

Shipping

We have partnered with 20 innovative grassroot companies that we believe can help reverse climate change. We allocate a fixed margin from every sale to support fund nature-based carbon removal solutions such as reforestation and soil carbon sequestration. Fund companies such as DroneSeed, Grassroots Carbon, and Pachama.

We are committed at Sock Stack to neutralize our shipping emissions and remove carbon dioxide from the atmosphere. Learn more here.

We also work closely with Royal Mail to ensure hassle-free, on-time delivery. Generally processing times are within 1 business day*. Processing times may also be extended during holidays, launches/re-stocks, limited edition releases and promotions. We will notify you as soon as your order ships or if we foresee any issues with fulfilling your order. Read our full Shipping Policy for more information.
*Please understand that business days do not include weekends and Bank Holidays (United Kingdom).

£3.95 flat fee for all domestic within the United Kingdom (free shipping over £22), 2-4 working days.
£5.95 express fee for all domestic within the United Kingdom, 1-3 working days.

Easy returns

Not completely satisfied with your purchase? Reach out within 35 days to explore hassle-free return options. We've simplified cancelations for a full refund and additionally return requests can be made from your online account. Please review our Refund Policy for more details. Thank you for your patience and understanding as we navigate this together.

Contact

Sock Stack does not have a call centre and we're not set up to handle high volumes of phone calls.

The Sock Stack brand was built online, including our customer support. Though you may receive an automated response every once in a while, all channels are manned by human staff who are eager to help you out, quickly and efficiently.

Thank you again for visiting Sock Stack. For information on our new product launches, please follow us on Instagram & Facebook. For customer service inquiries, please send us a message on Facebook Messenger or e-mail us at sockstack@outlook.com. For order inquiries, please include your order number for faster service.

Clearpay

Clearpay makes budgeting easier, allowing you to break down your payments into four installments, due every two weeks, interest free. Head over to Sock Stack and find something you love. Then, just add to bag and simply select Clearpay as your payment method at the checkout. Enjoy your new stuff right away and pay over four installments.

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Klarna

Buy now and pay 30 days later with KLARNA payment portal. You get all the “closure” of a full upfront payment, but with the cash-flow benefits of spreading the cost. The total amount charged to your card is no greater than if you simply paid for the entire purchase up front.

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Influencers

We are a young, bold homeware brand. We’re fun, we’re social and we’re an upcoming brand that doesn’t sleep. Interested in partnering? Apply today to be part of our community.

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Our Mission

Heatwave Thermalwear® envisions becoming the most celebrated, trustworthy, and sought-after brand by offering superior, distinctive, and inexpensive thermal wear products that exceed every customer's expectations. Heatwave Thermalwear's® vision is to become a leading thermal underwear baselayer brand by delivering the most refined and high-grade products to the customers that are thoughtfully developed to withstand extremely cold conditions while offering enhanced protection and unmatched comfort.

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Function, Fit & Style

Heatwave Thermalwear® strives to provide a diverse collection of the highest quality and affordable thermal underwear to men and women. Our thermal socks, long-sleeve base layers, long johns, hats and gloves are meticulously designed to be safe, lightweight, and breathable, providing fast-wicking and added warmth. As a customer-first brand, we are committed to fostering solid and lifelong relationships with our clients and aspire to deliver exceptional quality and value in our products.