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Heatwave Thermalwear

Heatwave® Pack Of 2 Men's Thermal Underwear Set, T-Shirt & Pants Baselayer Set

Regular price £15.00 GBP
Regular price Sale price £15.00 GBP
Sale Sold out
Tax included. Shipping calculated at checkout.


0.45 tog rating- hold more warm air close to the skin. Thermal underwear base layers with a soft brushed inner made from an advanced insulating yarn giving them high performance insulation. Comfort fit, the ribbed construction shapes to the contours of the body. The tops are also side seam free for extra comfort, Long johns are open fly.


Small - Top (Chest Size) 34-36” : Long John (Waist Size) 29-32”
Medium - Top (Chest Size) 37-39” : Long John (Waist Size) 33-35”
Large - Top (Chest Size) 40-42” : Long John (Waist Size) 36-38”
X-Large - Top (Chest Size) 43-45” : Long John (Waist Size) 39-42"
XX-Large - Top (Chest Size) 46-48” : Long John (Waist Size) 43-45”

n.b. all sizes are approximate


White, Blue, Charcoal, Black, Navy, Grey


50% Polyester, 50% cotton


Machine washable at 40°C, can be tumble dried, wash dark colour's separately

Carbon-neutral shipping with Shopify Planet
Carbon neutral shipping on all orders
shipping emissions removed
That's like...
miles driven by an average gasoline-powered car
We fund innovations in...
Direct Air Capture
Bio Oil


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.

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.
*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.

Clearpay UK Shop Now How It Works Banner Informative Infographic


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.

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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.

Customer Reviews

Based on 15 reviews
Pashar Chikanya

Heatwave® Pack Of 2 Men's Thermal Underwear Set, T-Shirt & Pants Baselayer Set

Sharen Campbell (Tollesbury, GB)
Thermal mens wear

All good

Sharon Lanyon (Wallingford, GB)
Great service

Really pleased with my items and quick delivery service too

Kevin Onn (Grimsby, GB)
Keeps you warm

Quality of the thermals is very good. They keep you warm on those cold days and nights. The fit is good but you have to expect variations in sizing. I'm very pleased with the purchase and will buy from Sock Stack again.

Peter Allinson-Fay (Sheffield, GB)
Hot Thermals

Very comfortable to wear

lawrence thomas (Newport, GB)
Thermal Underwear Set X2

These are just right for keeping warm on these cold days and nights ideal to wear under most of my clothes not to thin or thick and do a good enough job and now I'm able to turn the thermostat down and save money too

Christopher Amos (Liverpool, GB)
Great value

Better than I expected, 👍

Steven Foster (London, GB)

Heatwave® Pack Of 2 Men's Thermal Underwear Set, T-Shirt & Pants Baselayer Set

Lianne Moran (Liverpool, GB)

Heatwave® Pack Of 2 Men's Thermal Underwear Set, T-Shirt & Pants Baselayer Set

David Lee Coburn (London, GB)
Good Product

Good product does exactly what it says keep you warm during the cold weather fits well too