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Heatwave Thermalwear

Pack of 2 Men's Thermal Long Sleeve Top Warm Baselayer for Running Hiking Cold Weather Sportswear Durable Winter Clothing by Heatwave Thermalwear

Regular price £10.00 GBP
Regular price Sale price £10.00 GBP
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Heatwave® Pack Of 2 Men's Thermal Long Sleeve Top

Introducing the Heatwave® Pack Of 2 Men's Thermal Long Sleeve Top, the ultimate solution for enduring warmth and comfort. Designed specifically for active outdoor enthusiasts, this thermal underwear baselayer is perfect for running, hiking, sportswear, and workwear. Engineered with advanced insulating technology, the Heatwave® thermal tops set themselves apart with superior warmth retention and exceptional comfort.

Key Feature 1: High-Performance Insulation

Description: Featuring a remarkable 0.45 tog rating, these thermal tops are crafted from advanced insulating yarn. The soft brushed inner layer is specifically designed to hold more warm air close to the skin, providing high-performance insulation.

Benefits: This feature ensures that you stay warm even in the harshest conditions, making it ideal for outdoor activities and cold weather work environments. The advanced insulation keeps the cold out and the warmth in, enhancing your overall comfort.

Key Feature 2: Comfort Fit

Description: The ribbed construction of these thermal tops shapes perfectly to the contours of your body. Additionally, the tops are side seam-free, which enhances the overall comfort by eliminating any potential irritation points.

Benefits: The comfort fit ensures you can move freely without any restrictions, making these tops not only ideal for active pursuits but also for everyday wear. The seamless design adds an extra layer of comfort, allowing you to focus on your activities without distraction.

Key Feature 3: Durable Material

Description: Made from a robust blend of 50% polyester and 50% cotton, these thermal tops are built to last. This material combination offers durability while maintaining a soft and comfortable feel against the skin.

Benefits: The durable material ensures a long-lasting product that can withstand frequent use and washing. It offers the perfect mix of strength and comfort, making it a reliable addition to your wardrobe.


  • Small: Top (Chest Size) 34-36”
  • Medium: Top (Chest Size) 37-39”
  • Large: Top (Chest Size) 40-42”
  • X-Large: Top (Chest Size) 43-45”
  • XX-Large: Top (Chest Size) 46-48”

Note: All sizes are approximate.

Colours Or Style Options

  • White
  • Blue
  • Charcoal
  • Black
  • Navy
  • Grey

Care Guide

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

Why Choose This Product

Choose the Heatwave® Men's Thermal Long Sleeve Top for its unparalleled warmth, superior comfort, and durable construction. With a high-performance insulation system, seamless design, and robust material, this thermal top is perfect for any outdoor activity or cold weather setting. Join the ranks of satisfied customers who trust Heatwave® for their thermal wear needs. The combination of advanced features and practical benefits makes it the top choice for those who prioritize quality and value.

Additional Information

Usability: Whether you're running, hiking, or working in cold conditions, these thermal tops are designed to provide the warmth and comfort you need. They are versatile enough for various applications, making them a practical addition to your wardrobe.

Warranty and Support: Our commitment to customer satisfaction includes a comprehensive warranty and responsive customer support. Should you encounter any issues, our return policy ensures you can shop with confidence.


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.



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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 39 reviews

As described

Fred (Wakefield, GB)


BARRY GOODWIN (Southampton, GB)
Warmer now.

Nice and warm,does tge job.


Good price and fast delivery would recommend to others

John Evans (Manchester, GB)
Thermal wear

Great product good fit

Kevin Stafford (Littlehampton, GB)

Good product very pleased.

Mr D S Dixon (Boston, GB)
These were a good choice

I found these thermal vests (I ordered two packs each of two vests) well suited to my requirements. They are warm, comfy, the right size and the sleeve length is just right for me. They look smart and washed well. I would certainly buy these again.

As they were ordered shortly before Christmas, I was advised it would be several days before delivery, which was not unreasonable. They arrived in under two days, however, rather better than expected. Well done!

Chris Holroyd (Manchester, GB)
Great Warm Thermal Tops

Awesome thermal tops great feel and material, nice and comfy.

Ray Krelle (Burnley, GB)
Very warm !!

Great tops for the cold weather, I work outside and these tops keep me warm all day. The price is excellent, the quality is excellent and the delivery was excellent 5* will definitely recommend.

Julie Young (Sheerness, GB)

Very good