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Heatwave Thermalwear

2 Pack Boys Thermal Trousers Long Johns Black Baselayer for Schoolwear Camping Skiing High-Quality Moisture-Wicking Comfortable Fit Elastic Waistband Durable Winter Wear Ages 3-15 by Heatwave Thermalwear

Regular price £12.50 GBP
Regular price Sale price £12.50 GBP
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Heatwave® Pack of 2 Boys Thermal Trousers Long Johns Black Baselayer Schoolwear

These versatile black long johns provide essential winter warmth, serving as an ideal baselayer for camping, skiing, and daily school wear. Crafted from high-quality materials, they offer insulation, moisture-wicking, and a comfortable fit with an elastic waistband. Durable and easy to layer, these trousers are a must-have addition to any active boy's cold-weather wardrobe.

Key Feature 1: High-Quality Material

Description: Crafted from a blend of 50% cotton and 50% polyester, these thermal trousers ensure a perfect balance of softness and durability. With a TOG rating of 0.45, they provide excellent insulation, keeping the wearer cosy even in the coldest weather.


  • The high-quality material ensures long-lasting wear and comfort, making them an excellent choice for both indoor and outdoor activities.
  • The insulation keeps your child warm, reducing the need for multiple layers.

Key Feature 2: Moisture-Wicking Technology

Description: These trousers incorporate advanced moisture-wicking technology to keep skin dry and comfortable. The fabric efficiently draws sweat away from the body, ensuring a dry and pleasant wearing experience.


  • The moisture-wicking feature helps in regulating body temperature and prevents the discomfort of dampness during physical activities.
  • This makes them ideal for both athletic and casual wear.

Key Feature 3: Comfortable Fit

Description: Designed with an elastic waistband, these long johns offer a snug yet comfortable fit. The flexibility of the waistband ensures that the trousers stay in place, providing unrestricted movement for active boys.


  • The comfortable fit enhances freedom of movement, making them suitable for various activities ranging from school to sports.
  • The elastic waistband ensures ease of wearing and removing.


Available in a range of sizes to fit boys of different age groups:

  • 3-5 Years
  • 6-8 Years
  • 9-11 Years
  • 12-13 Years
  • 14-15 Years

Colours Or Style Options

This product is available in classic black, making it a versatile addition to any wardrobe.

Care Guide

These items are machine washable. Please follow the care instructions provided on the packaging to ensure long-lasting wear.

Why Choose This Product

Choose Heatwave® Pack of 2 Boys Thermal Trousers for unbeatable winter warmth and comfort. Our unique selling points include high-quality material, moisture-wicking technology, and a comfortable fit, all designed to meet the needs of active boys. Customers trust Heatwave® for its durability and reliable performance, making it a top choice for cold-weather wear.

Additional Information

Usability: Perfect for various activities such as camping, skiing, and everyday school wear, these trousers are versatile enough to be worn in multiple scenarios. Their durable design ensures they can withstand the rigours of active use.

Warranty and Support: We offer a satisfaction guarantee and friendly customer support to address any concerns. Please refer to our return policy for more information.


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.

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