--- product_id: 172692814 title: "Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set, Base Layers for Skiing, Long Johns for Boys Kids (Black, X-Large)" brand: "thermajohn" price: "$63.11" currency: USD in_stock: true url: https://www.desertcart.us/products/172692814-thermajohn-thermal-underwear-for-kids-boys-thermal-underwear-set-base store_origin: US region: United States of America --- # Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set, Base Layers for Skiing, Long Johns for Boys Kids (Black, X-Large) **Brand:** thermajohn **Price:** $63.11 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set, Base Layers for Skiing, Long Johns for Boys Kids (Black, X-Large) by thermajohn - **How much does it cost?** $63.11 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/172692814-thermajohn-thermal-underwear-for-kids-boys-thermal-underwear-set-base) ## Best For - thermajohn enthusiasts ## Why This Product - Trusted thermajohn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description When it comes to daily wear, Thermajohn offers thermal underwear for kids for a snug fit. Our boys thermal underwear make the perfect base layer kids for when your kids are outside in the snow or lounging indoors. Our boys long johns thermal set features an elastic waistband so they stay in place with no drooping or chances of them falling off. Kids long johns thermal set boys are lightweight and breathable and can be worn under their regular clothes as part of a winter layering system. Long johns for boys will retain their body heat so they stay warmer longer. To keep your kids dry and odor free, our boys long johns with wick away moisture to reduce the chances of hypothermia and frostbite. ThemaJohn Kids Boys Thermal Set is so comfortable, your kids will want to wear them to school, bed, sled riding even indoors playing video games. Our kids thermals top and bottom set are essential for your kids cold weather comfort with fleece for added warmth. These boys thermal pants, boys fleece lined thermal sets are made to feel ultra-soft against their skin so there’s no need to worry about discomfort like chafing or itchiness. Any boys thermal shirt or clothing for extreme cold weather is perfect for traveling and easy to take care of. Best extreme cold weather thermals or long underwear kids make perfect kids winter clothes. You can buy these as a kids thermals top and bottom set to keep your younger children warm. Boys thermal pants and cold weather gear is essential for when the winter is at its worst and kids snow gear is good for all occasions. Kids base layer ski or boys thermals is vital for the slopes and hiking and toddler thermal underwear set keep the warm with the family. Kids winter baselayer and kids long johns is the right type of youth thermal underwear set for playing in the snow or building a snow fort. Winter thermal clothes for kids and a toddler long johns, toddler long underwear or boys fleece lined thermal set will keep the small kids warm. ## Images ![Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set, Base Layers for Skiing, Long Johns for Boys Kids (Black, X-Large) - Image 1](https://m.media-amazon.com/images/I/61m04yaNgtL.jpg) ## Available Options This product comes in different **Color, Size, Style** options. ## Questions & Answers **Q: My son normally wears an 8 but I did the measurements on the chart and they don’t make sense. What would a small 11yr old wear!** A: I got xl for my son who’s 11 but he’s tall **Q: Sizing? i have never bought this brand. where’s your sizing chart??** A: I ordered an extra large for my 12-year-old son given the sizing photo provided that says extra large is equivalent to an 11 to 12. The measurements on the package that arrived, however, are much larger, and they were huge. I will be re-ordering two sizes smaller. **Q: If my son normally wears a 3t what size would i order?** A: Hi! Our sizing starts at XS which is suitable for ages 5-6. **Q: Can they go in washer? Dryer?** A: Hi! Yes, you can put them in the washer and dryer to launder. Please wash with like-colors only! ## Frequently Bought Together - Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set | Kids Base Layers for Skiing | Long Johns for Boys Kids - Thermajane Thermal Underwear for Kids Long Johns, Girls Thermal Underwear Set, Base Layer Kids Long Underwear - Arctix Kids' Insulated Snow Bib Overalls --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/172692814-thermajohn-thermal-underwear-for-kids-boys-thermal-underwear-set-base](https://www.desertcart.us/products/172692814-thermajohn-thermal-underwear-for-kids-boys-thermal-underwear-set-base) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-16*