--- product_id: 171973817 title: "Boy's Thermal Set" brand: "thermajohn" price: "$4.66" currency: USD in_stock: false reviews_count: 10 url: https://www.desertcart.us/products/171973817-boys-thermal-set store_origin: US region: United States of America --- # Advanced moisture wicking Superior heat retention Ultra-soft fleece lining Boy's Thermal Set **Brand:** thermajohn **Price:** $4.66 **Availability:** ❌ Out of Stock ## Summary > ❄️ Gear Up, Stay Warm, and Never Miss a Snow Day! ## Quick Answers - **What is this?** Boy's Thermal Set by thermajohn - **How much does it cost?** $4.66 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/171973817-boys-thermal-set) ## Best For - thermajohn enthusiasts ## Why This Product - Trusted thermajohn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Freedom to Move:** 4-way stretch design ensures unrestricted mobility for every sled ride, hike, or snowball fight. - • **Seamless Layering:** Slim fit base layer slips effortlessly under any outfit for discreet, all-day warmth. - • **Cloud-Like Comfort:** Fleece lining so soft, your kids won’t want to take it off—perfect for play or downtime. - • **Dry & Fresh Always:** Moisture-wicking fabric keeps sweat and odors at bay, even during the most active snow days. - • **Stay Toasty All Day:** Locks in warmth with premium heat retention tech for endless winter adventures. ## Overview Thermajohn Thermal Underwear for Kids is a high-performance base layer designed to keep boys warm, dry, and comfortable in cold weather. Featuring ultra-soft fleece lining, moisture-wicking polyester-spandex fabric, and 4-way stretch for mobility, this thermal set is perfect for skiing, snow play, or cozy indoor wear. Its slim fit and elastic waistband ensure a secure, comfortable fit that layers easily under winter clothes. ## Description desertcart.com: Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set, Base Layers for Skiing, Long Johns for Boys Kids (Black, Small) : Sports & Outdoors Review: I’m being forced to write this… - I’m being forced to write this by my son. I ordered these to go under his Halloween costume. They arrived today and he tried them on to make sure they fit. He won’t take them off and has been going on and on about how they are so comfortable and amazing, and the best thing he’s ever worn. Now he’s just wearing them around the house. I have a feeling I’m going to be coerced into buying a few more pairs. He’s already asked how much they cost. When I told him, he said “What?! They should be like $300!” I’m glad they’re not. Review: Very soft and high quality - Purchased the XL (US size 11-12) for my 10 year old. They are slightly loose on him, but would fit as they should for an 11/12 year old. I was impressed with the thickness, and quality feel. Very soft on the inside. The double layer of fabrics is perfect for our northern Maine winters. I would not necessarily use them for hiking or fall temps. Very impressed. Buy them. ## Features - Heat Retention: Our boys thermal underwear set will keep your child warm. Wear the boys long johns thermal set as a baselayer under clothes or wear alone around the house. - Ultra Soft: Thermajohn kids, long johns for boys have a fleece lining that will keep your boys comfortable when they’re out in the cold or relaxing at home. - Moisture Wicking: Stay dry and odor free with our kids thermal set. They wick away moisture and are ideal for snow clothes for kids. - 4 Way Stretch: Mobility and Flexiblitly are essential for movement and activity in our kids long underwear. This boys fleece lined thermal set will fit snugly, but stretch so there’s nothing holding them back. - Layer Up: Long johns for kids are perfect as a base layer. They are slim enough to fit under your boy’s regular clothes easily for added protection from the cold. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07MD6WDYR | | Age Range Description | Kid | | Apparel Closure Type | Elastic | | Apparel Fabric Stretch | High Stretch | | Best Sellers Rank | #399,304 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #67 in Boys' Thermal Underwear Sets | | Brand Name | Thermajohn | | Care instructions | Machine Wash | | Collection Name | Winter | | Color | Black | | Customer Reviews | 4.7 out of 5 stars 1,394 Reviews | | Fabric Type | 100% Polyester | | Fabric type | 100% Polyester | | Global Trade Identification Number | 00810000413072 | | Item Weight | 4.8 ounces | | Material Type | Fleece | | Occasion Type | home | | Package Quantity | 1 | | Pattern | Solid | | Product Care Instructions | Machine Wash | | Size | Small | | Sleeve Length Description | Long Sleeve | | Sleeve Type | Long Sleeve | | Style Number | J-T-B-1836 | | UPC | 810000413072 | ## Images ![Boy's Thermal Set - Image 1](https://m.media-amazon.com/images/I/61m04yaNgtL.jpg) ## 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! ## Customer Reviews ### ⭐⭐⭐⭐⭐ I’m being forced to write this… *by C***. on October 18, 2024* I’m being forced to write this by my son. I ordered these to go under his Halloween costume. They arrived today and he tried them on to make sure they fit. He won’t take them off and has been going on and on about how they are so comfortable and amazing, and the best thing he’s ever worn. Now he’s just wearing them around the house. I have a feeling I’m going to be coerced into buying a few more pairs. He’s already asked how much they cost. When I told him, he said “What?! They should be like $300!” I’m glad they’re not. ### ⭐⭐⭐⭐⭐ Very soft and high quality *by D***K on January 21, 2025* Purchased the XL (US size 11-12) for my 10 year old. They are slightly loose on him, but would fit as they should for an 11/12 year old. I was impressed with the thickness, and quality feel. Very soft on the inside. The double layer of fabrics is perfect for our northern Maine winters. I would not necessarily use them for hiking or fall temps. Very impressed. Buy them. ### ⭐⭐⭐⭐⭐ Perfect for cold weather *by M***3 on May 26, 2024* Got these for my kids to wear under tball uniforms. They kept them warm and were a great fit. They are super soft, the kids loved them and I would totally buy again. Great price for the set. Fabric was thick and soft on the inside. Perfect for layering, especially for sports when it’s kind of cold but not super cold. ## Frequently Bought Together - Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set | Kids Base Layers for Skiing | Long Johns for Boys Kids - Anlisim Kids Merino Wool Ski Socks 3 Pairs Girls Boys Thermal Winter Warm Thick Breathable Socks for Skiing Snowboarding - Thermajane Thermal Underwear for Kids Long Johns, Girls Thermal Underwear Set, Base Layer Kids Long Underwear --- ## 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/171973817-boys-thermal-set](https://www.desertcart.us/products/171973817-boys-thermal-set) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-26*