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Heatwave Thermalwear

Women's Thermal Long Sleeve Top and Pants Set Winter Base Layers Warm Insulating Cotton Rich Fabric Sizes S to XXL Multiple Colors by Heatwave Thermalwear

Regular price £10.00 GBP
Regular price Sale price £10.00 GBP
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Heatwave® Women's Thermal Long Sleeve Top & Pants Sets – Warm Winter Baselayers

Introducing the Heatwave® Women's Thermal Long Sleeve Top & Pants Sets, the ultimate solution for staying warm and comfortable during winter. Perfect as baselayers, these sets are designed to add a lightweight thermal layer that keeps you cozy without adding bulk. With a cotton-rich fabric and innovative insulating yarn, these thermal wear sets are unparalleled in warmth and comfort.

Key Feature 1: Advanced Insulating Yarn

Description: The Heatwave® thermal sets are made from an advanced insulating yarn, delivering high-performance insulation. The soft brushed inner layer enhances warmth by holding more air close to the skin.

Benefits: This feature ensures maximum heat retention, making the thermal wear ideal for extremely cold conditions. Users can enjoy superior warmth without compromising on breathability.

Key Feature 2: Comfort Fit Ribbed Construction

Description: The ribbed construction of the Heatwave® thermal sets shapes to the contours of your body, providing a snug but comfortable fit. The tops are side seam-free, adding to the overall comfort.

Benefits: This design ensures the thermal wear moves naturally with your body, minimizing any discomfort during prolonged use. The seamless construction reduces irritation and enhances the overall wearing experience.

Key Feature 3: Cotton-Rich Material

Description: Made from 88% cotton and 12% polyester, the Heatwave® sets offer excellent breathability while maintaining warmth. The cotton-rich fabric ensures extra comfort and durability.

Benefits: This blend provides a soft and breathable feel, minimizing sweat and skin irritation. It's perfect for daily wear under clothing during the cold season.


The Heatwave® Women's Thermal Long Sleeve Top & Pants Sets are available in a variety of sizes to ensure the best fit for everyone. Choose from sizes ranging from Small to XXL.

Colours Or Style Options

Available in three classic colours: White, Marl Grey, and Black. These timeless shades make them versatile for layering under any outfit.

Care Guide

To maintain the quality and longevity of your Heatwave® thermal sets, follow these care instructions:

  • Machine washable at 40°C
  • Can be tumble dried
  • Wash dark colours separately

Why Choose This Product

Choose Heatwave® Women's Thermal Long Sleeve Top & Pants Sets for unmatched warmth, comfort, and durability. These baselayers are crafted from high-quality materials and feature advanced insulating technology, ensuring you stay warm during the coldest months. With positive user testimonials and a reputation for excellence, Heatwave® is the trusted choice for winter thermal wear.

Additional Information

Usability: Perfect for outdoor activities like skiing, hiking, or simply staying warm during daily commutes. The versatile design makes them suitable for both active and casual wear.

Warranty and Support: Heatwave® offers a satisfaction guarantee and reliable customer support. Check the brand's return policy for hassle-free returns and exchanges.


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 £40), 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.


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 For order inquiries, please include your order number for faster service.


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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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.



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.

Sock Stack

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.

Sock Stack

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.

Customer Reviews

Based on 2 reviews
Laura Allum (Devizes, GB)
Thermal set

Great value set

Alison Alderson (Reading, GB)
Cosy for winter days

Prompt delivery. I ordered two sets, white and grey. They are perfect for wearing as an extra layer so we don't have to keep the heating on all day. I can honestly say I have been wearing them ever since they arrived on my doorstep.